Shadow Priest's Staff, also called the Staff of Shadow Priest, is a silver sceptre holding a three spikes like guards. This staff was introduced in Mortal Kombat II, Mortal Kombat Trilogy, Mortal Kombat: Deception and Mortal Kombat: Unchained.
However, in Mortal Kombat: Shaolin Monks and Mortal Kombat X in the Portal, Shadow Priests have no staff.