The Great Forest Spirit

Bestow {3}{b}{g} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It
becomes a creature again if it's not attached to a creature.)
Indestructible
Enchanted creature gets +3/+4 and
indestructible.
At the beginning of your upkeep, sacrifice each creature you control with 4 or more +1/+1 . counters on them. Then put a +1/+1 counter on each creature you control.