Succubus is the second encountered as the level boss of Mission 6. This fight is scripted as long as the player performs each cycle in the first attempt. The reason why Definitve Edition has different cycle is because player does not have enough ability points to buy Overdrive II
Changes to the original game
The idea stays the same for both versions after Demon Evade:
During the Final Phase, it's possible to break Succubus hands in one Prop If you are close to it on the right side.
Original game demo
Definitve Edition demo