One use only. Multiple Grey Seers and Warlock Engineers may purchase as many Warpstone Tokens as are allowed within the limit of points they are able to spend on magic items. Warpstone Tokens do not count against the total Arcane items a model is allowed to bear.

A Grey Seer or Clan Skryre Warlock may choose to eat some warpstone to boost his powers. Before casting a spell announce which model is eating Warpstone Tokens. For each token consumed, a Wizard can add a single dice to his casting effort. These dice are added to the normal power dice, although this does allow users to roll more dice than is normally allowed by their level. A spell may be cast entirely with warpstone.

For any of the warpstone generated dice that rolls a one the Wizard suffers a wound with no armour saves allowed. The results of miscasts or irresistible force apply as normal. When using both normal power dice and Warpstone Token generated dice it is a good idea to roll separately or use dice of a different colour (green-tinged ones work best!).