The Experiment No. 124 is an enemy in Crisis Core -Final Fantasy VII-. It is the strongest experiment in the game, and was created in the image of Sephiroth. The Sephiroth imitation possesses great speed and can unleash a deadly four-strike combo. The player should guard against this combo, then hit him with Costly Punch. The imitation will most likely strike back with the unavoidable Heartless Angel attack that will reduce Zack's HP to just 1. The player should quickly use X-Potions to replenish Zack's HP after the attack, continued by hitting the imitation with another Costly Punch. As the imitation teleports frequently, area effect magic such as Flare and Ultima are useful.