Tuka, Promise fulfilled

Lifelink, Doublestrike, Hexproof, Indestructible,
Whenever this creature transforms draw 4 cards
At the begining of your upkeep remove a counter
from every permanent.
If a permanent had all of its decay counters
removed it's cotroler sacrifices it.
{b/g}: Put 2 decay counters on target permanent.
Everything rises but to fall, and increases but to decay.