Active when you have certain number pieces of this class on board, each level of the same synergy effect stacks 2: Required Pieces -1 for Synergies of Race/Class that requires 4 and above Pieces 4: 1 less chess piece is required for activating synergy with at least 4 unique chess pieces; if there's only the synergy of one race/class is activated other than the Wizard synergy, then the highest tier of this synergy will be activated immediately