Ayachi, the Summoner

Vigilance, Lifelink, Indestructible
{t} Make all tapped creatures Vampire's in
addition to other types.
{4}{b}{w} Deal X damage to creatures with the
avatar type. Where X is Ayachi, the Summoner's
power.
Ayachi, the Summoner's power is equal to the
number of Vampire creatures on the battlefield.