Menace, haste
Whenever Satya, Aetherflux Genius attacks, create a tapped and attacking token that's a copy of up to one other target nontoken creature you control. You get
![Emblem e](/images/productsymbols/e_icon.gif)
(two energy counters). At the beginning of the next end step, sacrifice that token unless you pay an amount of
![Emblem e](/images/productsymbols/e_icon.gif)
equal to its mana value.