Magical Butterfly

Birth - {1}{g}{g}{g/u}{x}: Look through your discard
pile and choose one card, and for every 2 other {x} you paid, you choose one more. Put the cards
you chose on the battlefield, but as caterpillars. Transform this card into a caterpillar or pay {g/u}.
Explosion - {x}: Discard this card. All opposing creatures on the battlefield take {x}/3 Damage.