Mask Of The Leaf Spirit

Whenever Mask Of The Leaf Spirit enters the
battlefield under your control, you may attach
it to target creature you control as an
enchantment aura. Mask Of The Leaf Spirit
becomes a creature again if it's not attached
to a creature.
Mask Of The Leaf Spirit and enchanted
creature have trample, reverence, and protection
from spells.
(Whenever you gain life for the first time each
turn, tap or untap target permanent.)