May not be taken by a unit. Only ONE Saurus character or Skink character may take the Mark of the Old Ones per army. The character may re-roll a total of D3 (roll at the start of the game) single D6's per game. Each re-roll entitles the player to take a single D6 of his own that directly effects the character including one of the dice rolled as part of a 2D6, 3D6, etc) and roll it again.

This can potentially cause Irresistible Force or avoid a Miscast. Remember that you cannot re-roll a dice more than once.