Most powerful spells?

[Argitoth]

I'll put this Haunted Forest + Swarm debate to rest. I have much experience with this combo. You'd be surprised what it's NOT capable of. If the dragonflies cannot fly (because of a storm) then you're going to have lots of trouble. If not enough dragonflies turn into manikins at the same time, that's aditional trouble. This combo cannot always kill a horde of devils. This combo sometimes can't even kill SCs. It's a good combo, but it has its limits. If someone is totally destroying your dominion (Mictlan, Marignon), you are screwed. This has happened to me more than once even with 10 dominion from the start.

But everyone should know this combo works best with C'tis because of the fact that C'tis assassins and mages have death and nature magic. The only problem is they lack nature gems, so Pangaea is a good choice too.

ANYWAY, you see... It has its limits. It is not a cheap combo compared to all the other strategies out there. I've lost a good amount of games using this strategy.