Fate/Grand Order Command Code Guide: Best Codes for Farming and Bosses

Command Codes are one of those FGO systems that people ignore for a year and then suddenly can't live without. They're little crests you stamp onto a servant's five face cards, and each one fires off a small effect every time you attack with that card. Free crit damage, free stars, even free NP charge, all sitting there once you know the tricks. The system went live on NA back at the 3rd Anniversary in 2020, and it's only gotten better since. Here's how the whole thing works, which codes deserve your openers, and how they plug into farming loops and boss kills.

How Command Codes Work and Where to Slot Them

Every servant has five face cards. A Command Code gets engraved onto one of them, and its effect triggers each time you use that specific card to attack. That last part matters more than people think. Your Noble Phantasm is not one of the five face cards, so codes never fire on the NP itself. They only do their thing on regular card attacks.

Before you can engrave anything, the card slot has to be unlocked. Each card needs its own opener, and the opener type has to match the card: Arts Code Opener for an Arts card, Quick Code Opener for a Quick card, Buster Code Opener for a Buster card. On top of the opener, you pay a chunk of QP that scales with the servant's rarity:

| Servant Rarity | QP Per Card | | --- | --- | | 5★ | 1,000,000 | | 4★ | 500,000 | | 3★ | 300,000 | | 2★ | 200,000 | | 1★ | 100,000 |

So unlocking all five cards on a 5-star runs you about 5 million QP. That's real money, even by late-game standards, which is why you don't slap openers on every servant you own. Your main damage carriers come first.

Openers come from two places. Da Vinci's Workshop sells one of each type every month for 100 Mana Prisms apiece, and event shops hand them out pretty regularly (that started around the Oniland Halloween event in 2020 and never really stopped). Removers work differently, and this is the part that trips people up. A 1★ or 2★ code can be swapped out for free, though the old code gets destroyed. Anything 3★ or above needs a Code Remover to take off safely. Removers cost 1 Rare Prism each in the Rare Prism shop, capped at 3 per month, or you grab them from event shops. Since good 5★ codes are limited and removers are scarce, think before you stamp a rare code on a servant you might bench later.

Duplicates aren't useless either. Burning spare codes pays out a little QP plus Mana Prisms, from 100 QP and 1 prism for a 1★ up to 2,000 QP and 5 prisms for a 5★. Not huge, but it adds up.

So where do the codes actually go? Damage and crit codes belong on the cards you attack with the most, usually the strongest cards of your main attacker. Utility stuff like heals and debuff clears fits nicely on cards you click without expecting much, or on supports. Some codes are picky about card type (a "when engraved on a Buster card" code literally won't work anywhere else), so check the text before you commit. And card order genuinely matters: buffs from a code last 1 turn, so if you want a buff to help your NP, play the coded card first and the NP right after it.

Best NP Damage Command Codes

Codes can't boost the NP card directly, but a few of them do the next best thing. When you attack with the engraved card, they grant a short NP Strength buff to that servant. Since the buff lasts 1 turn, you chain the coded card before your NP and the NP swings harder. It's a free damage bonus that a lot of players never bother to set up.

The standout here is Da Vinci, a 5★ code that bumps NP Strength by 15% for 1 turn when you attack with the engraved card. That's the biggest straight NP damage number on any code, and on a servant who fires NPs constantly, it's basically permanent. Everyone's Girl, Da Vinci is the team-play version: 8% NP Strength for all allies for 1 turn, which adds up across a full boss team.

| Code | Rarity | Effect on Card Attack | | --- | --- | --- | | Da Vinci | 5★ | +15% own NP Strength (1 turn) | | Mirage on the Sea of Sands | 5★ | +10% own NP Strength (1 turn), +10% Critical Strength | | The Destructive Star | 5★ | +10% own NP Strength (1 turn), +10% Special ATK vs Heaven attribute | | Empress of the Hanging Gardens | 5★ | +10% own NP Strength (1 turn), gain 2 crit stars | | Wizard of Menlo Park | 5★ | +10% own NP Strength (1 turn), +5% NP Gain | | Everyone's Girl, Da Vinci | 5★ | +8% NP Strength for all allies (1 turn) | | Mage of Flowers | 5★ | +10% own NP gauge (once every 3 turns) | | Crest of the Titan's Pit | 3★ | +5% NP Gain |

A couple of those deserve a closer look. Mage of Flowers is really a farming tool wearing a boss-fighting hat. Ten percent NP gauge per attack, once every 3 turns, means a looper who has to face-card for a turn or two still tops herself off on the way to the next NP. Wizard of Menlo Park splits the difference with a small NP gain rider. Crest of the Titan's Pit is the budget pick, a 3★ that's cheap to move around and still nudges your gauge faster.

The worked example looks like this: your Arts looper has Da Vinci engraved on an Arts card. Turn comes, you tap that Arts card first, then her NP. She gets 15% more NP damage on the NP that turn, every turn she can set it up. Against a boss with a damage cap race or a break bar you're pushing through, that's a real chunk of free damage, and it cost you zero skill cooldowns.

Who gets these? Your NP nuker, nine times out of ten. If you run a servant whose whole job is firing the biggest NP possible and then ducking out, stamp the NP Strength codes on her cards. If your damage comes from crits instead, skip ahead to the next section, because those points are better spent there.

Best Star Generation and Crit Codes

Quick refresher on how stars work. Hits drop crit stars during the turn, then at the end of the card chain the stars scatter onto your cards for next turn, weighted by each servant's star weight. A card holding ten stars always crits. So there are really two jobs for codes here: making more stars, and making sure the stars land on the card that can actually use them.

For making stars, The Holy Night's Aurora is the queen. Four crit stars every time you attack with the engraved card, no conditions, no cooldown. Hero of the Endowed and Priestess of the Silver Key give 3 stars with a bonus attached (a 200 HP heal, or stripping one offensive buff off the enemy). Crest of Humanity boosts star drop rate by 30%, which plays nice with servants who throw out a ton of hits per card.

| Code | Rarity | Effect on Card Attack | | --- | --- | --- | | The Holy Night's Aurora | 5★ | Gain 4 crit stars | | Hero of the Endowed | 5★ | Gain 3 crit stars, restore 200 HP | | Priestess of the Silver Key | 5★ | Gain 3 crit stars, remove 1 offensive enemy buff | | Knight of the Abyssal Sanctuary | 5★ | Gain 3 crit stars, inflict Curse (500 dmg/turn, 3 turns) | | Crest of Humanity | 3★ | +30% Critical Star Drop Rate | | Code: Glitter | 2★ | +20% Critical Star Drop Rate | | Armament of Victory | 4★ | +100% Critical Star Gather Rate | | A Kind Wish | 4★ | +150% star gather rate on an Arts card | | Lady Justice | 5★ | +100% star gather rate, gain 2 crit stars | | Miss Majin | 5★ | +100% star gather rate, +10% Critical Strength | | Heaven-Sent Kurama Child | 5★ | +20% Critical Strength | | Mistress of the Heavens | 5★ | +25% Critical Strength on a Buster card | | Brush of a Mad Painter | 4★ | +20% Critical Strength on an Arts card | | The Improbable Phantasmal Horse | 4★ | +20% Critical Strength on a Quick card | | Sword of Beginning and End | 4★ | +1000 flat damage |

The gather codes are the sneaky-good ones. Star gather rate pulls stars toward that specific card, so pairing Miss Majin or Lady Justice with a fat crit damage code on the same card turns it into a magnet that always crits and always hits like a truck. That's the classic setup on a crit DPS: gather plus damage, stacked on the card you plan to swing with.

For raw crit damage, Heaven-Sent Kurama Child's flat 20% is the cleanest. The card-type versions (Mistress of the Heavens on Buster, Brush of a Mad Painter on Arts, The Improbable Phantasmal Horse on Quick) match the 20-25% range and fit whatever your attacker's best card is. Sword of Beginning and End isn't a crit code at all, but 1000 flat damage per swing is cheap, guaranteed damage, and it plays on any servant.

Boss fights are also where the special-attack codes earn their keep. These only fire against enemies with the right trait, but when they line up, they hit hard:

| Code | Rarity | Effect | | --- | --- | --- | | Great Fool of Owari | 5★ | +30% Critical Strength vs Divine trait | | Imperial Consort of the Heavenly Emperor | 5★ | +30% Critical Strength vs Burned enemies | | Chain of the Heavens | 5★ | +20% Special ATK vs Divine | | Demonic Dragon of Twilight | 5★ | +20% Special ATK vs Dragon trait | | Anti-Saber Weapon | 5★ | +20% Special ATK vs Saber class | | The Moon Goddess in Love | 5★ | +20% Special ATK vs Male enemies | | The Nun with a Bodhisattva's Merciful Gaze | 5★ | +20% vs Lawful, +20% vs Ruler |

Divine and Dragon enemies show up in boss fights all the time, so Chain of the Heavens and Demonic Dragon of Twilight are usually the safest grabs. And there's a fun combo hiding in the burn column: pair Imperial Consort of the Heavenly Emperor with a burn code like The Bearded Scarlet Gentleman's Command Seal (500 burn damage per turn), and your attacker gets a near-permanent 30% crit damage buff against whatever she's cooking.

Farming Setups With Golden Fleece and Kaleidoscope

Quick reality check before anything else: there is no Golden Fleece craft essence or command code in FGO. If you went looking for one, that's a mixup. The Golden Fleece is lore, the Argon Coin, the item from Jason's story that shows up as a skill on Medea and Jason. It's not something you can equip. The golden farming CE people almost always mean when that name gets tossed around is Kaleidoscope, so let's talk about that one, because it really is the backbone of farming.

Kaleidoscope starts the equipped servant at 80% NP gauge, 100% at max limit break. It's a pure ATK craft essence (500 base ATK, 2,000 at max) with cost 12, and it's permanently in the gacha pool, so most veterans have a few copies kicking around. The budget ladder below it: The Imaginary Element starts you at 60% (75% MLB), and Dragon's Meridian at 30% (50% MLB). Those two carry a lot of early-game farming teams.

The math on a turn-1 NP is simple. MLB Kaleidoscope means the servant NP's immediately with zero help. An 80% Kaleidoscope needs one small battery, somewhere in the 20% range, to fire on turn one. The standard loop shape looks like this: an AoE servant with a self-charge skill holding the Kaleidoscope, charge-heavy supports backing her up, and NPs on waves 1, 2, and 3. When your own charge supports aren't enough, borrow a friend's Kaleidoscope holder; that works for pretty much every event farming node.

So where do command codes fit into a farming team? Honestly, for pure 3-turn speed runs they do less than you'd hope, because codes don't fire on NP cards and speed runs are nothing but NPs. Their value shows up the moment a run gets messy:

• Mage of Flowers on a face card keeps the gauge creeping up on turns where you actually have to attack with cards.
• Sword of Beginning and End (flat 1000 damage) lets a support's stray card attack kill low-HP trash instead of tickling it.
• Star gen codes like The Holy Night's Aurora set up face-card crits for those nodes where one wave refuses to die to a single NP.

During events, one caveat: bonus CEs usually beat Kaleidoscope for currency farming once your damage is comfortable, since more drops per run beats a slightly faster run. Plenty of players run the event CE on everyone and lean on batteries and friend supports for charge instead. Your call based on how hard the node hits.

Where to Farm Command Code Materials

Here's the slightly annoying truth: openers and removers don't drop from any free quest. There's no "grind this node for openers" answer. Everything comes through shops and events, so it's more about spending smart than farming hard.

Your sources, in rough order of importance:

1. Da Vinci's Mana Prism shop. One Arts, one Quick, and one Buster Code Opener per month, 100 Mana Prisms each. That's 300 prisms for the full set, every month, no exceptions. This is the steady drip.
2. Event shops. Most events since Halloween 2020 stock both openers and Code Removers, usually for cheap event currency. Grab them every time, even if you don't need them right now.
3. Rare Prism shop. Code Removers at 1 Rare Prism each, limit 3 per month. Only spend here when you actually need to peel a 3★+ code off someone.
4. The codes themselves. The 1★ and 2★ codes (Code: Glitter, Code: Focus, Code: Cure and friends) come from Friend Point summons, so rolling your FP stash slowly fills out the cheap tier. Most 3★+ codes are event rewards or limited quest drops, and a few older ones eventually land in the Rare Prism shop permanently, like First Servant at 5 Rare Prisms.

Feeding those sources is its own grind. Mana Prisms come from the 40 AP daily quests and from burning spare embers and unwanted CEs. Rare Prisms mostly come from burning 4★ and 5★ gacha CEs you'll never use, plus certain campaign rerun rewards. QP for the slot unlocks comes from Treasure Vault dailies and pretty much every event shop, and at 1 million QP per card on a 5-star, you'll want the buffer.

Two habits worth building. First, prioritize unlocks on your actual farming servants and boss killers, the ones in the lobby every week, and let the benchwarmers wait. Second, buy the three monthly openers even in months where you have zero plans for them. Slots stay unlocked forever once opened, and the openers you skip are openers you'll be waiting on next month.

Three openers a month, 300 Mana Prisms, removers saved for the codes you actually regret. That's the whole routine, and it keeps every future limited code one engrave away from done.