The Prophet, Masked Healer

Hexproof, Indestructible, Vigilance, Defender
This creature is not effected by power/toughness counters.
When this creature enters the battlefield, its controller becomes the monarch.
At the end of your turn, prevent 10 damage dealt
to its controller, and any permanents he/she also controls.
{t}: If your devotion to white is 12 or greater, all players must sacrifice 3 permanents. Then,
transform The Prophet, Masked Healer.