Satya, Aetherflux Genius is a mythic Legendary Creature — Human Artificer card from Modern Horizons 3 Commander (M3C), collector number 23.
Menace, haste Whenever Satya attacks, create a tapped and attacking token that's a copy of up to one other target nontoken creature you control. You get {E}{E} (two energy counters). At the beginning of the next end step, sacrifice that token unless you pay an amount of {E} equal to its mana value.