What if we made Mordekaiser similar to death knights in WoW gameplay wise(loosely)?

Im not talking make him have frost, blood, or an unholy trait, im talking enslaving those he kills and draining the life of his enemies to benefit himself.

Example ability ideas are as following:

Mordekaiser can mark champs similar to his R and slowly deal damage over a duration with increasing damage the lower the target is but without healing him.

Maybe an active move where he gains a shield for 3x the damage ability after it wears off on an enemy. Say the move is a dot that deals 100 damage over 5 seconds, after the 5 seconds he gains a 300 damage shield that decays a bit quickly.

A move where he can interact with a dead body of either a large monster, epic monster, cannon minion, or champion and after a short cast time he summons them as an undead form of what they were before that last 30 seconds or once they enter combat they rapidly start to die and explode on death for a fixed damage so that champ and dragon ghosts arent grossly different in explosion damage.

Perhaps a soul prison move where morde stuns an enemy champion into a prison for a duration but they cannot be hurt, healed, or moved during the stun.

My favorite idea would be to summon his little battalion(his wraiths?) down a path similar to hec ult but without morde moving, the fear, but with mini champion type things.