My spell idea

Sunstorm's Wrath

Damage: <3<3<3<3<3
Mana Cost: 40
Cooldown: 3 sec
AoE radius: 4 Blocks

Opens a portal to an alternate dimension where everything has been burned away. A Sunstorm comes through, creating electro-spacial flux that forms lightning around the portal.

(Causes Lightning at the final projectile location)