Drownie (5e Creature)
From D&D Wiki
Medium undead, neutral evil
Skills Perception +3
Amphibious. The drownie can breathe air and water.
Innate Spellcasting. The drownie's spellcasting ability is Wisdom (spell save DC 11). It can innately cast the following spells, requiring no material components:
Undead Fortitude. If damage reduces the drownie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the drownie drops to 1 hit point instead.
Multiattack. The drownie makes two melee attacks: one with its slam and one with spear. Alternatively, it can cast a spell instead of making a spear attack.
Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (2d4) bludgeoning damage.
Spear. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 3 (1d6) piercing damage, or 4 (1d8) piercing damage if used with two hands to make a melee attack.
Sometimes, when a person drowns at sea, they live on. They maintain much of their original self, but are fundamentally altered; they will try and entice others, siren-like, to join them under the waves. Drownies are particularly drawn to those with a fear of drowning, which they can sense for miles like a shark smelling blood, and to sailors driven mad by isolation or stress. They are fond of singing, even when not luring the living to their doom.