Door Destroyer, Minvrak

Trample
{r/g}:Door Destroyer, Minvrak gains first strike until
end of turn.
{t}Target Creature gains Trample.
Whenever Door Destroyer, Minvrak attacks,
you may put an instant or sorcery card from your graveyard on the bottom of your library.
If you do, exile the top two cards of your library.
You may play those cards this turn.