[Blofeld]

I have a painful experience - my first use of Wrathful Skies.

Enemy besieged my castle with a force of an Arch Devil, 30 each devils and imps and a hundred infantrymen. I frantically teleported in anything I could.

My Air Queen with staff of Storms cast Wrathful Skies, Air mages cast Thunder Wards - pretty much every my troop had 50% shock resistance.

Battle didn't Last very long - about 10 rounds. Invading army was obliterated, as well as 12 of my commanders and all my troops, safe for a dozen crossbowmen and a few mechanical men. I lost loads of equipment. The only commanders which survived had air magic and cast Resist lightning, which gives 100 SR.

Never, ever use Wrathful skies with non-immune troops.
50% SR just isn't enough.