Bolivar Asturias

Ethereal Sight. The ghost can see 60 feet into the Ethereal Plane when it is on the Material Plane, and vice versa.

Incorporeal Movement. The ghost can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.

Valkur's Curse. Bolivar cannot set foot on land and leave the ocean. Upon touching any earth surface with his feet, Bolivar slowly disintegrates, leaving behind heaps of ethereal dust.

Etherealness. Bolivar enters the Ethereal Plane from the Material Plane or vice versa. It is visible on the Material Plane while it is in the Border Ethereal, and vice versa, yet it can't affect or be affected by anything on the other plane.

Life Drain. Melee Spell Attack: +4 to hit, reach 5 ft., one creature. Hit: 8 (3d4) necrotic damage. The target must succeed on a DC 10 Constitution saving throw or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the creature finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

Multiattack. Bolivar makes two zap attacks.

Zap. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (2d4 + 4) lightning damage.

Lightning Bolt (Recharge 5–6). Ranged Spell Attack: reach 60 ft., one target. The target must succeed on a Dexterity saving throw or take Hit: 18 (4d6 + 4) lightning damage.