Cloak of the Grave King

You touch a creature, giving it some of the power of the grave and undeath. The target gains the following benefits for the duration of the spell:

• It gains a +3 bonus to AC
• When it takes the Attack action to make a melee weapon attack, it can make two additional weapon attacks with that weapon
• It is immune to Necrotic and Radiant damage
• It cannot be reduced to less than 1 hit point

When the spell ends, the target can't move or take actions until after its next turn, as a wave of lethargy sweeps over it and it suffers two levels of exhaustion. If the creature takes damage during this turn of recuperation, it dies outright with no death saving throws taking place.