Isaiah, Latter-day Priest

Whenever a cleric enters the battlefield, gain
1 life
{t}{w/b} Sac a creature: create a 0/1 flying
spirit token with when this creature dies, each
opponent loses 1 life. If the sacrificed creature
was a cleric, untap Isaiah
Sacrifice 5 spirits: create a legendary 5/5 flying
demon token named Sean