Birkorvik, Slayer of Fools

If Birkorvik's evoke cost was paid, return it to
your hand and create a 2/2 green and white
Knight creature token with vigilance named
"Foolish Slayer."
Flying
{1}{r}: Birkorvik gets +2/+0 until end of turn.
{2}{b}, Sacrifice a creature: Birkorvik deals damage
to any target equal to the power of the sacrificed creature.
Evoke {2}{g/w}