YORICK rework concept

Hey everyone, here are my thoughts on how to competely rework Yorick.

(Passive) Gravedigger Whenever an allied or enemy champion, epic monster, cannon minion, super minion or red/blue buff die, they spawn a Grave. These Graves require 6 ranged attacks or 3 melee attacks to be destroyed, and slow all enemies in a small area around them by 15%.

(Q) Rise and Bite Yorick starts digging the closest Grave. If he is not interrupted for 3s, he spawns an uncontrollable Ravenous Ghoul that attacks nearby enemies and the Grave is destroyed. If an unit is killed by a Ravenous Ghoul, another one is instantly spawned.

If there are no nearby enemies, Yorick spawns a Grave where he is standing.

[passive] Whenever a Ghoul attacks a champion, Yorick restores health equal to a % of the damage dealt.

(W) Haunting Voices Yorick calls the spirits of the dead to haunt the living; each enemy close to a Grave is instantly affected by a Spectral Ghoul. Every time a Spectral Ghoul attacks an enemy, that enemy is silenced for 1s.

(E) Corrupting Plague Yorick corrupts the Graves in a target area with an otherworldly Plague; upon being destroyed, a corrupted Grave explodes, slowing and dealing damage over time to all nearby enemies, and spawning a Diseased Ghoul.

Corrupted Graves hit by this ability explode as if it had been attacked; Corrupted Graves are indistinguishable from normal ones.

(R) Omen of Death Yorick starts channeling and calls all his Ghouls to him, which flock towards their master. When all of his currently active Ghouls reach him, he fuses with them, changing his appearance and size and obtaining various bonuses based on the amount of Ghouls absorbed.

5s duration for each absorbed Ghoul. +10% maximum health for each Ghoul +5% damage dealt for each Ravenous Ghoul. +5% movement speed and tenacity for each Spectral Ghoul. +5% damage reduction for each Diseased Ghoul.