Quote Originally Posted by Sephiroth View Post

X-Death definitely fails when a greater (will) power confronts him. The void itself was too strong for him and he lost control and there are villains with a will power or abilities which woulnd't even give him a chance to attack them or which would resist. Sephiroth, Ultimecia and I am pretty sure Zemus for example would be a problem for him. They all have a too strong will or certain abilities to be a problem for him.
You forget that his will is only overpowered after he has been critically injured by the party. Its not like the he struggled to control the Void before then. The other issue here is that you assume that the Will of the Void is less potent than Zemus, Sephiroth, and Ultimecia's will, if the Void was powerful enough to overcome its own creator, then chances are that Exdeath's will may actually be even greater than all three of them, this can shown by the fact he can still affect the world and control his own minions even after being sealed by the crystals which are pretty much the closest thing to an omnipotent power in the FF mythos. So I would argue that he could probably overpower all three of them, or be able to blink them out of existence before they could break his concentration.

Ultimecia for example has a power which is older and greater than the void: Reality and Fiction. She can read minds and make them real. That is how she summoned Griever. Griever was born out of Squall's mind. Of course I do not think she can completely control Reality and Fantasy.
What's the use in having the power to make thought and inanimate object into reality when dealing with a being who controls the power to erase it from existence? I mean, she'll just make some demonic being from Exdeath's mind and then he'll just have it swallowed by the Void. Its at best a diversion if he doesn't just have the Void swallow both of them.

Chaos is a power as great as the void. But even though he seems to have the power in Dissidia I really don't think Chaos had that power in Final Fantasy. "Chaos" was definitely just thought to be a powerful-final boss name.
In FFI, Chaos simply has the power to manipulate time bu he is definetly powerful being, yet I felt his greatest threat was the manipulation of time to create his eternal time loop. I don't think he could take Exdeath, let alone half the FF villain cast. In Dissidia he's just much beefier but he really doesn't have the power of the Void, he simply just has enough raw power to tear the cosmos apart but in reality it's Shinryu who has the real power in that game.

Of course there is also a villain whose power is based on "the stronger my will gets the stronger I get - oh, and by the way, my will is the strongest of all and indestructible and can absorb energy and will power to get stronger". But I don't continue here. This is a thread about X-Death and I have already mentioned that X-Death is a powerful son of a tree.
You're obviously talking about Sephiroth, but you kind of forget two major facts about his power, first he has never shown the ability to mentally overpower any living being without the being being infected with Jenova's cells. Secondly, while he has gained the power to halt Holy and can hold onto his sense of individuality to remain somewhat sentient within the Lifestream, once again, his will's ability to influence others is limited to Jenova's physical influence, like Geostigma. There is also the fact that his will has been challenged and overcome by Aerith's will within the Lifestream, meaning that while Sephy certainly has a powerful mind, its not as unique and special as fans make it out to be, and its possible the will power of villains from other FFs are on equal standing if not possibly greater. I mean look at Sephy's most similar ancestor in the series, Emperor Mateus, who conquers the afterlife after he's killed and comes back. Not many FF villains can make that claim, and I would argue his willpower may actually be greater than most of the FF villains.

As for Cloud of Darkness Sephiroth1999AD, I would probably say it has the greatest possibility to overcome Exdeath, since it essentially is implied to be a physical manifestation of the Void itself, and much like Exdeath, required some Deus Ex Machina shenanigans to defeat as well.