Mithrix, King of Nothing

Menace, haste

Whenever Mithrix, King of Nothing 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.

“REGRET THIS JOURNEY, HERETIC.”