Creature — Human Artificer
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Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for
.)
Whenever a nontoken artifact you control is put into a graveyard from the battlefield, create a 1/1 colorless Servo artifact creature token.
Improvise can’t be used to pay for anything other than the cost of casting the spell. For example, it can’t be used during the resolution of an ability that says “Counter target spell unless its controller pays .”