[Rework Concept] Karthus, the Deathsinger

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**Passive - Death Defied: **When Karthus, or one of his near by allies, take lethal damage, their spirit remains active for a 7 seconds, rendering them unable to move, attack, or use active items, but becoming untargetable and invulnerable for the duration as well as being able to use abilities at no cost. If their abilities interact with their basic attack, they may basic attack while their ability is active. Dead allies deal reduced damage.

Dead allies gain Rhythm of the Dead, on non-damage over time abilities, and Life Defiled while under the effect of Death Defied.

Q - Rhythm of Death - Passive: After damaging an enemy champion, or large monster, Karthus can see the beating of their heart, appearing as a circle around them that closes around them with every beat. Damaging an enemy with Lay Waste on the beat deals double damage and refunds the mana it cost. Killing minions with Lay Waste refunds half it's cost.

• Lay Waste - Active: Karthus briefly reveals the target area which he detonates after a brief delay, dealing magic damage to all enemies within.

W - Choir of the Dead - Passive: Enemy champions Karthus kills add to his Choir, once for every enemy champion.

• Wall of Pain - Active: Karthus creates a passable curved wall of energy out of the dead, which curves around Karthus, which is also increased is size with the spirits of enemy champions killed, at the target location for 5 seconds, granting sight around its pillars. When an enemy first passes through the wall, they are slowed and they take bonus damage from all sources of magic damage. The slow and the bonus damage dealt decays slowly over a few seconds.

• While the wall is active, each enemy champion Karthus has added to his Choir will cast Lay Waste immediately after Karthus does at a target location, dealing half of Karthus's damage, which detonates a moment after Karthus's Lay Waste detonates.

E - Life Defiled: Karthus roots himself for several seconds, dealing magic damage around him as he begins to sing the words from his book. While rooted Karthus gains bonus cast range, and the area between Karthus and his Wall of Pain deals true damage. Casting Lay Waste does not immediately consume his mana, but instead causes it to be consumed over time.

Recasting this ability ends it's duration early. This is automatically active while under the effect of Death Defied.

R - Chosen's Requiem: Karthus begins channeling for a few seconds, while channeling a prompt will appear with all of the enemy champions within it. Choosing one will cause Karthus to summon the Wolf to strike them down when he ends his channel, from anywhere on the map, dealing magic damage which is increased based on their missing health. Not choosing an enemy will cause Karthus to deal magic damage to all enemies, but not increase it's damage based on their missing health.

• Encore of Retribution: If Karthus cast this while under the effect of Death Defied, Karthus instead calls the Wolf down on all enemy champions and large monsters that killed him or assisted in killing him, increasing the damage based on their missing health.