Swain collects Soul Fragments when Visions of Empire and Nevermore hit enemy champions, and also when they die.

Soul Fragments heal for 3% health and provide 12 maximum health.

Swain extends his demonic arm to launch eldritch bolts at enemies, dealing 50 / 80 / 110 / 140 (+38% AP) magic damage to enemies within range.

Each bolt after the first deals 15 / 25 / 35 / 45 (+8% AP) magic damage (up to 110 damage).

Swain summons a demonic eye that explodes after a short delay, dealing 80 / 130 / 180 / 230 (+55% AP) magic damage slowing by
30% / 40% / 50% / 60% for 2.5 seconds and revealing targets hit for 4 seconds. If Vision of Empire damages an immobilized champion it will critically strike for 50% damage.

Champions hit will give 1 soul fragment.

Swain launches a demonic wave that deals 35 / 85 / 135 / 185
(+25% AP) magic damage to enemies along the way, then turns back after reaching the furthest distance, dealing 35 / 50 / 6+5 / 80
(+25% AP) magic daamge to the area and rooting enemies withing the area for 1.5 seconds.

Recast: Swain pulls the rooted champions to himself and collets 1 Soul Fragment from targets.

Swain frees the demon, dealing 20 / 40 / 60 (+10% AP)
magic damage per second to enemies within his range and restoring 15 / 28 / 40 (+15% AP) health to himself.

Recast: Can be cast again after 2 seconds of Demonic Ascension, dealing damage and slowing enemies.

Non-champions units will restore 10% health.
Demon Ascension is controlled by Demon Energy, wich depletes over time, and can be recharged indefinitely by draining enemy Champions. Champion takedowns fully restore Demon Energy.