Spells

Every spell a character can cast: what it costs, how often it can be cast, and how its projectile flies.

Casting spends mana, which refills on its own at 8 per second while you are alive. A cast is aimed with the camera and launches a projectile that flies in a straight line until it hits an entity, hits the terrain, or runs out of time. The server checks your mana and cooldown, so a cast it refuses simply never happens.