Myrkul, Lord of Bones

If Myrkul, Lord of Bones is dealt lethal damage at the same time that its controller's life total is reduced to less than or equal to half their starting life total, Myrkul will have indestructible at the time state-based actions are performed and survive.

The last ability creates a copy of the card as it last existed in the graveyard, not of the creature as it last existed on the battlefield.