They disperse throughout the terrain surrounding your hive. They follow both preprogrammed and live instructions by your CLOUDER, a member of Team Scourge, whose role is to provide you with a challenging scenario, while your teammate does the same for Scourge's other player.
Hey check it out. Every week we'll be revealing some new troll characters from Hiveswap until Act 2 is out. Follow the Troll Call here, and meet the first two here. Expect a few more surprises like this to drop in coming weeks.