Crisis

is a power possessed by the Original Demon.

Description
This ability allows the user's power power to constantly increase while taking damage. So as the more he is dying, the more of his power is enhanced.

The Original Demon shows this power in his battle against Ludociel, which proves overwhelming for Ludociel because of the exponential increase in the Original Demon's power after several attacks along with his body being slowly devoured by his curse.