Illaoi, Kraken Priestess

Trample
At the beginning of combat on your turn, you
may reveal a creature card from your hand. If
you do, Illaoi get +X/+0 until end of turn,
where X is that creature's mana value.
Whenever Illaoi deals combat damage to a
player you may put a creature, with mana
value equal or less than the damage dealt, from
your hand onto the battlefield.