Megidoalaon is probably the strongest spell, yeah.

[A short pause.]

If you have any magical aptitude. [Atsuro doesn't.] It does have an element, actually; it's Almighty, which means that nothing resists it. It costs a lot of energy to use, though.

...The point is, demon abilities are fine if you have to fight demons. But... I'd rather just have a normal world, really.