Whenever one of your other creatures is destroyed, or 1 of the cards under your evolution creatures is put in the graveyard, you may choose a number. If you do, reveal the top card of your deck. If that card has a cost equal to your chosen number, destroy 1 of your opponent's creatures with 5000 power or less. (Afterwards, return the revealed card to the top of your deck face down.)
The light from the "Original Heart" shining in the sky caused one ancient warrior after another to awaken.