You win when you kill all heroes and the blue dungeon is destroyed. It's my favourite level and the one I'm most proud of.

0:31 I'm waiting for the first spell to be researched. When your creatures have successfully researched a spell/room they are so happy they stop working for a short time. If I pick the mistress directly the bridge will be researched too late due to that fact. 0:34 I let the mistress fire a lightning before casting possession 0:56 I need the punk barbarian so I claim and save him 0:58 I put the barbarian in the library not to make use of his brain (he has 0 research skill) but to make him busy and prevent him to go in a suicidal fight too soon. 1:03 I'm not acting crazy, it's one of those erratic mouse movements I've talked about. 1:11 selling a part of the bridge to force my imp to work and claim the ground beneath the transfer bonus. Imps get afraid by enemy creatures and they run away, I want to avoid that. 1:31 dropping order and location is important if you want to win the fight 2:14 the transfer window vanish because the game informs me I've won