Lord Emerson Krystalum

Emerson has advantage on saving throws against being charmed, and magic can't put Emerson to sleep.

Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 5 (1d8 + 1) piercing damage.

Emerson adds 2 to its AC against one melee attack that would hit it. To do so, Emerson must see the attacker and be wielding a melee weapon.