Galactikuriboh

Discard this card (Activate only when you are being attacked): Search your deck for a card named Galaxy-Eyes Photon Dragon and put it onto the battlefield. If you do, you cannot cast creature spells this turn.
Galactikuriboh enters the battlefield tapped with X galaxy counters.
Galactikuriboh gets +0/+X where X is the number of galaxy counters on it.

{5}{t}: Search your library for a dragon creature card and add it to your hand. Then shuffle your library