Bindblade

Equipped creature has vigilance and lifelink.
Whenever you gain life, if Bindblade is equipped
to a creature, put a +1/+1 counter on equipped creature and a bind counter on Bindblade.
{4}{w}, Unequip Bindblade: Exile target creature
with power less than or equal to the number of
bind counters on Bindblade.
Equip {3}