Beloved floof

Companion
Indestructible
Hexproof
You cannot lose more than 4 life at a time.
While beloved floof has less than 10 growth counters on it, each player cannot play nonhuman creatures.
At the beginning of your upkeep, put a growth counter on beloved floof, and if 30 growth counters are on beloved floof, you lose the game.
While 10 or more growth counters are on beloved floof, it has ‘transform beloved floof—gain 4 life.’