Who says ball of lightning isn't the best dragon ability?

[guderian2]

I like lighting spell.
I think It's useful against armies with one or two strong numbers units, because it concentrates damage against those units (with a great overall damage total) and also softers them before the beginig of the unit vs unit combat.
Also, its cheap in rage cost and is the only dragon spell that generates rage (on every strike), so its also a way to boost your rage.