Aletreon

+1: On first use, destroy a creature, on second use, disable target creature effects, on third use, tap 5 creatures, after third use, repeat
0: Aletreon becomes a 10/10 Dragon creature with Flying and Indestructible until end of turn. Prevent all damage that would be deal to him this turn
-9: Put Aletreon into your library fifth from the top. You gain an emblem with "Whenever you cast Aletreon, destroy all creatures."