What it does
Fabricator Claw Array is a specific card (an artifact equipment from the Universes Beyond: Warhammer 40K set), not a keyword, but here's how it works. When equipped, the creature gains an activated ability: pay 4 generic mana, tap, and sacrifice another artifact or creature to create a number of 1/1 colorless Servo artifact creature tokens equal to that sacrificed permanent's mana value.
The common mistake is thinking you can sacrifice the equipped creature itself—you can't, it must be "another" permanent. Also, the token count scales off mana value, so sacrificing a high-cost permanent (or one with a large value) yields more Servos.
In Commander, it shines in artifact-token or sacrifice decks, turning expendable bodies into wide boards. Pair it with sacrifice payoffs or token doublers for explosive value, but remember the steep 4-mana, tap-down activation cost limits how often you can fire it each turn.
Iconic cards with Fabricator Claw Array
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