Smaaji, Vitalizing Celestial

Lifelink, Flying
Boast — {6}{w}{w}: Smaaji gets +X/+X until end
of turn, where X is your devotion to white. This
cost {1} less to activate for each other creature you
control that attacked this turn. (Activate this
ability only if this creature attacked this turn and
only once each turn.)
He leads an army like no other, by harnessing the
power of the sun