Pantheon, Unbreakable Spear

Allegiance - Targon (Look at the top card of your
library. You may play creatures with Allegiance -
Targon from the top of your library.)
Double strike
You may reveal this card from the top of your
library to make it attack in your combat phase. It
still is on top of your library but goes to the
graveyard if it dies during the combat phase.