Nemesis introduces "Expert Dice", which may be used as normal dice, or the player can select their value before the roll, but no two Expert Dice can be selected to have the same value. Expert Dice are also used as buffer against die penalties, where each Expert Die counteracts one die penalty, but then must be rolled as a normal die.
Nemesis introduces "Expert Dice", which are used for both regular and custom dice rolls, with limitations on values to prevent duplicates, and act as buffers against die penalties.