Any number of things dealing with Psychic Powers. The most notable power a Sorcerer has in 40k is the Doombolt, which is basically a ball of demonic energy used as a projectile weapon.
They're most commonly used as HQ units (leaders)
But there are a couple of cases where that's not it. In a certain Legion of Chaos Marines, Sorcerers are used as Sergeants in common squads which contain 9 men (Sorcerer included)
Depending on the faction they're associated with, they can have a number of different motives for doing any number of horrific things.
They're most commonly used as HQ units (leaders)
But there are a couple of cases where that's not it. In a certain Legion of Chaos Marines, Sorcerers are used as Sergeants in common squads which contain 9 men (Sorcerer included)
Depending on the faction they're associated with, they can have a number of different motives for doing any number of horrific things.