Skaven sorcerers draw upon Dark Magic for their power, but they can supplement this by consuming lumps of warpstone. Before the game begins the Skaven player determines how much warpstone he has. This is represented by the warp tokens included in the Warhammer Battle Magic game.

Once the player has established how much warpstone he has, he makes a pile of warp tokens. Any of his Skaven sorcerers can use this warpstone during the battle, it does not have to be allocated to any specific sorcerer. To establish how much warpstone you have consult the following chart and make the appropriate dice rolls for each Skaven sorcerer in the army. A D3 is the score of an ordinary D6 halved rounding up: 1-2 = 1, 3-4 = 2, 5-6 = 3.