Locust swarm and mind scream are potion rewarded for beating City of the Dead and The Destroyer. Mind scream is a spy attack potion, and locust swarm is attack potion.
Locust scream is also needed to be Figure of Death, which awards two others potions.
ERR NOT to put to fine a point on this But Claws of Carnage :lol: is now called Talons of Carnage Please edit the first post to reflect this error :lol: