Vitaloof

Companion
Hexproof, indestructible
While Vitaloof has less than 10 age counters
each player cannot play non human creatures.
At the beginning of your end step, put an age
counter on Vitaloof. If 30 or more age counters
are on Vitaloof, you lose the game. If 10-29
age counters are on Vitaloof, you cannot lose
more than 4 life at a time transform her