The mastermind uses the same model and sounds as the hybrid destroyer, scaled up. The mastermind has two abilities, one which is similar to Nova's Domination ability, but the mastermind can take control of multiple units at once. The ability is unfinished and not named. The second ability is the same Phase Shift as the hybrid nemesis, phasing a target unit out of existence for a period of time.
Causes the targeted unit to phase out for 10 seconds. Phased units are immune to all damage and most effects, but they are unable to attack or use abilities.