Catalyst

When Abathur, Evolution Master of the Swarm, is cornered by Terran forces, he believes he is about to die. Across the galaxy, a last ditch summoning ritual tries to find something that could fight Voldemort. Neither of these events go as expected. Now Abathur, trapped in the body of a Terran, must rebuild the swarm on his own, and attempt to avoid getting killed in the process.

Story made and owned by Strandshaper on Fanfiction.net