Keira Metz

You may look at the top card of your library at any time. Once per turn, if it is an instant or sorcery spell, you may cast it from the top of your library.

If it has a mana value greater than Keira Metz's power put a +1/+1 counter on her.

If it has a mana value that is less than Keira's power, return it to your hand at the beginning of your next turn.