Guojin, Death Tyrant

Haste, Flying, Trample
Whenever Guojin, Death Tyrant attacks, flip a
coin, if heads discard a creature card then create a
token that's a copy of that creature, it gains haste,
exile it at the beginning of your end step,
Otherwise exile target creature card from your graveyard, then create a token copy of the
exiled card, it gains haste. Exile it at the
beginning of your next end step.