Zariël, Soulsearcher

At the beginning of your upkeep: Soulsearch
(reveal the top card of each of your opponents
library. If it is a creature.
The one that used soulsearch transform into that creature.
It has every ability and power and toughness. It
can transform into more creatures. The power
and toughness counts up. But as different
creatures.When the revealed
card is not a creature. Put it under the library)