Milhyet, Tenzoth Sovereign

Flying, spectral (Milhyet, Tenzoth Sovereign
returns to your hand at the beginning of your end step.)
Void — At the beginning of combat on your
turn, if Milhyet is the only creature you control,
it gets +3/+3 and gains haste and trample until
end of turn.
Whenever Milhyet deals combat damage to an
opponent, that opponent mills that many cards.