@sanethier well that's most likely. They can't beat him even with the divine artifact. It will probably go like this, they will use the essance absorbing pill to absorb his powers, but it will be too much even for the artifact to handle, both of them will probably get killed(or maybe the alliance leader will survive, he was mc's pray from the beginning anyway). But in the fight he'll unleash his true strength and probably ascend to heaven. Now that the demon place has a rightful and strong leader (mc), demon lord prolly has no desire to remain in this world. I mean the sole reason he was suppressing his power is to find a worthy heir.