Another good spell to use against resistant creatures, and even against the Black Dragon, yes, you read well, spell on black dragons (bug?!) is plague. I don't think it works on Cyclops though, he has Stone ability. But try Plague on Dragons. Or Plague+Helplessness. It brings most creatures to defense = 1.

Wow, great idea! I should have known this because I usually roll with black dragons on my team and was thoroughly frustrated that necros kept plaguing them.

My super archer team usually does lvl 3 helplessness on level 5 units, or pygmy on lower units. However, black dragons gave me a serious problem until you told me about plague!

Can plague infect your own troops? That was the only reason I never got it.

I think that plague can infect your own troops, yes, so you must be a little careful , but even so, it hurts them more then it hurts you. I didn't have a problem with it, because usually the unit that is targeted by plague and helplessness and then attacked by all units , does not make it next round alive ;)