"When you first start the game, when you select your imps to mine out rocks etc, get 1 or 2 imps to claim the land you have just mined, this helps get your mana reserves up quicker, to do this drop an imp on your already claimed territory next to an unclaimed piece of land." - Azza

"somewhere you can see unclaimed terrain in a room where you has to dig fo getting in. just pickup an imp and drop him on the unclaimed terrain. BLAST" - dk2 master

"When possible, arrange your defenses so that your enemy has to come through a guard room first, then through the training room. Neither room is hard to replace or recapture, but the close proximity of training minions to the guard room decreases response time to a threat and limits the damage an enemy can do to your dungeons infrastructure. Outside of the guard room create a bottle-neck with sentry traps and a steel or magic door. While your enemy tries to overcome these defenses, the sentry traps and your own minons can dismantle the attacking force." - Amlodhi

"if you want dark angels you have to have a 5x5 temple for 2,2 5x5 temples for 4and so on" - hippi

"If you want your useless creatures replaced by, for example dark angels. Create a combatpit and lock it off with doors so no imp can enter. Dumb your creatures in the pit and let them die." - Jaap Maarleveld  ... (There is a easyer way.Just drop then into a portal - anonymous

"When building a guard room always make sure you have a door in back and a sentry trap around it" - jordan

"in lvl 20 there is a smal hero claimed room surounded by undigabal rock with a lvl 20 dark angel inside. (this was the tip part, now a question) how the hell do i get there" - some guy