Metamorphosis now also If «Vengeance Demon Hunter»: greatly empowers Soul Cleave and Spirit Bomb; otherwise: increases current and maximum health by 5% and Armor by 20%.
While your demon form is active, the first time you activate each empowered ability it induces a Demonsurge, causing you to explode with Fel energy, dealing Fire damage to nearby enemies.
Demonsurge also causes your active demon form and its demonic features to grow and become more pronounced each time it triggers.