basically it worked because they had a sentient mind to be controlled so the form they were in (pure energy or flesh/bone) didnt matter
so he has INFINITE revives? There was to be some type of backdraw is he undefeated in his verse lol
If his mind hax resistance is as good as you say and he literally ALWAYS comesback to life. Madaras only choice is to seal but the phone will just revert that too right? Now if madara had izanami (probably knows about it) he could stop that time rewind stuff but yeah its not on his profile
No backdraw, at the beginning maybe it could be said that type of magic consume a lot of magic power so if you killed him enough the reserves could be consumed completely, but current not even that possible backdraw exist since he obtained infinite magic power.
Probably, yes, there would also be the futher support of the things inside the Miniature Garden.
And btw, all the wives also have it, so they are also more or less unkillable.
Ok but has he atleast been damaged before?
In all the after stories he have only faced two serious threats, a dragon who literally was Japan and an AI that dominated a futuristic world.
In the first case they couldn't just kill the thing since that would result in Japan geting destroyed, so he ins't developed a plan in which he got control of all the energy in the world so the dragon couldn't get food and then others damaged the mental image of the dragon until it got too exhausted and was sealed by Hajime.
In the second case he was extremely nerfed in a place where he couldn't use most of his abilities, equipment (he just had his two guns) and even the thing he could use didn't had their normal power, so what he did was futher develop his perpetual motion artifact to a point in which could be used practically and with the infinite energy defeated the AI.
They got the artifact to be unkillable, but they are so OP in this point that they never had actually needed it, they either already surpass everything with their own powers and stats or just grow/adapt to do so, for example Shea, she in a dangerous situation go to just use spatial magic in a defensive way (she can do the Limbo thing) to directly break space with just her punches.
If he's unkillable, is it possible to incap him ?
Maybe? Though it would need to be something that isn't reverted by the phone, which I don't know what could be.
He created the thing so they are precisely unkillable so it makes sense that there is no weakness.