A spell-caster is a character archetype in gaming with the ability (usually magical, but sometimes spiritual) to cast spells. Spell-casters can take the form of sorcerers, wizards, warlocks and healers. Spell-casters usually are limited in the number and type of spells they can cast by an expendable resource, called magic points, which generally regenerates with time. Often, these characters do not have direct methods of attack, and so rely on their special magical attacks and on other, more combative, game units to fend for them. Spell-casters generally have less health and are less tough than other units (for instance, the tank). Due to their high damage output but low damage resistance, they are sometimes colloquially referred to as glass cannons.
Spell-casters which use powerful direct-damage spells are called "nukers".