Single black dragon - how far can you get?

[Zechnophobe]

Doesn't he only place three towers? Am I just remembering only a run through on Hard, and he does 5 on impossible? I am completely not recalling him ever using 5.

[DGDobrev]

It's 5 for all difficulties. Maybe you were either destroying them too fast or he was more interested in using his mass attack than summon towers?

[Zechnophobe]

Weird, did I just get horribly lucky? I seem to recall having my two stacks of Green and Red dragons only dealing with 3 (two total stacks). All were evil gremlins, so I just ignored them. This was in my last no loss impossible paladin game. Or, it is possible I am just completely not remembering it correctly.