Frost
- spells should consist of a mixture of putting frostbite on an enemy slowing them down and also direct damage depending on the spell used, like how the acid thrower spell spews acid but instead its frost, or a pillar of spikes in a row form from the ground around you in an aoe attack!
Void - spells should be stuff like dark magic like a dark circle on the ground where you cast it that apply constant damage while the spell is up, obviously this seems op but to balance it you could make the spell small and only apply to ground troops. Another type of spell with void could be like a laser beam of dark energy with piercing abilities