Ksann Swarm Master

When Ksann Swarm Master comes into play, put
a 1/1 black Locust token with flying into play for every creature controlled by your opponents.
Whenever a creature controlled by an opponent leaves the Battlefield, you may pay {b} to put a
1/1 black Locust token with flying into play.
{b},Sacrifice a Creature: Regenerate target Insect creature.