Consume Essence

When you start your turn having swallowed at least one creature, each swallowed creature must succeed at a Fortitude save (DC %1) or gain a temporary negative level. Swallowed creatures that die from these negative levels are consumed as per disintegrate. This is a death effect. [Special] If you are of the undead type, each time a swallowed creature gains a temporary negative level from this ability, you add 5 temporary hit points to the number of hit points that swallowed creatures must deal to escape, up to a maximum of 15 temporary hit points. These temporary hit points last for 10 minutes.