Bularia, Demonic Corrupt

Deathtouch, first strike, double strike.
{t}, {1}{p/b}: Exile target creature, then exile X target creatures, where X is the creature's toughness.
If more than 5 creatures are dying at once, untap this.
This creature's power is equal to how many creatures are exiled due to this ability at one turn.
This is the transformation of Bularia, Chief of Katrina.