Abyssal Absorption

The draining of all forms of energy, be it life force or other, into the Nihilitree

Chaos

Entities and Items affected by it have no visual effect until fully drained of energy, at which point they sink into the branch of the Nihilitree they're on

Rapid draining of all forms of energy
For Entities, extreme pain until it ceases, whether it ends by the affected Entity getting off the Nihilitree or by dying

If one is absorbed by the Nihilitree, nothing remains afterwards

None in the moment

Energy absorbed by Nihilitree gets released as Mana in Isle of Myria

Immense unbearable pain

None

None, it automatically applies to everything and everyone that touches Nihilitree

None

It can't affect items or entities outside of the Rift

None

A resistance to it does exist (Rift Resistance), but all it does is slow the effect