Skill description
Barter with Oblivion to trade vitality for power, sacrificing your Health in exchange for 3000 Magicka.
The exchange reduces your Healing Done and damage shield strength by 50% for 4 seconds.
Equilibrium is a skill located in the Mages Guild (which can be found in the Guild skill tree). Equilibrium is a base skill, and can be morphed into Spell Symmetry or Balance.