Wrath of God & Purgatory

[PyroStock]

How exactly is the damage for these spells calculated? I tried searching even in the Dom2 forum, but only found Warth of God targetting question . I've read WoG & Purgatory are "stronger and more likely in friendly dominion", but that's vague. WoG is AN and can kill a 15life unit in it's own dominion(10) so I'm curious about the formula. Does a higher level caster increase the damage potential too?

Same goes for purgatory's damage if anyone knows. An old Dom2 post said Purgatory harms your own undead too, but given the Dom3 description I'm guessing that's been changed.