Ghoul King’s Cloak

You touch a creature, giving it some of the power of a ghoul king. The target gains the following benefits for the duration:
* Its Armor Class increases by 2, to a maximum of 20.
* When it uses the Attack action to make a melee weapon attack or a ranged weapon attack, it can make one additional attack of the same kind.
* It is immune to necrotic damage and radiant damage.
* It can’t be reduced to less than 1 hit point.