Thunder Cone

"Son of a dog! Nothing like death crackling past your cheeks to train your butt-clencing muscles."
Cothro

An attack employing mana-generated lightning-based magic in large quantity to fry targets within a large cone. This spell is very slow to prepare and very exhausting. It not only requires multiple Thunder Trails coexisting in a specific direction, but must also beproperly contained in a Mana field. It can spread to allied forces or even to the user if such precautions aren't taken. To use it at the beginning of an engagement is ill advised as its Surge is obvious, so one must look for the best opportunity.