Swain frees the demon within for 12 seconds, gaining 125 / 200 / 275 (+5 per Soul Fragment) bonus health.

While Demonic Ascension is active, Swain drains the 3 enemies closest to him, prioritizing champions, dealing 35 / 50 / 65 (+14.167% of ability power) magic damage to them each second, up to a potential 420 / 600 / 780 (+170% of ability power) damage per enemy. He also restores 20 / 35 / 50 (+16% of ability power) health per second for each enemy hit, reduced by 90% against minions and monsters.

Swain can end the effects of Demonic Ascension early to cast Demonflare, and automatically does so at the end of its duration.

Demonflare: Swain unleashes a nova of soulfire, dealing a minimum of 100 / 150 / 200 (+50% of ability power) magic damage to all nearby enemies, plus 75% of the health Swain drained during Demonic Ascension. Demonflare's damage is capped at 200 / 300 / 400 (+100% of ability power).