tactics for playing against Dungeon.

Irresistible magic ignores magic defense => so it also works on Darkness, go read the manual yourself, you walkthrough expert.

Let's figure it out, smart guy!!
Literally! Irresistible magic - Enhances all the hero's attack spells: The damage inflicted by them on a protected unit (possessing magic resistance or magic protection) increases by (20, 40, 50, 75) depending on the mastery level!
And why did darkness magic suddenly become an attack spell? Nothing is said here about other spells (cursing, weakening, slowing, etc.), you'll also say that the Berserker's damage increases!:D