Swain frees the demon within for 12 seconds, gaining 125/200/275 (+5 per soul Fragment) health and doubling the bonus health that he has collected from Soul Fragments. Every second, he drains the 3 closest enemy champions for 35/50/65 (+14% bonus Ability Power) magic damage, healing him for 20/35/50 (+16% bonus Ability Power) health. After a brief delay, and upon draining any amount of health, Swain can cast Demonflare.
Demonflare: Swain unleashes a nova of soulfire dealing magic damage equal to 100/150/200 (+50% bonus Ability Power) plus 75% of the damage he healed (up to a total of 200/300/400 (+100% bonus Ability Power)) and ending his transformation.
Swain can drain non-champions to heal for 10% of the normal amount.