Bloodsac

Camouflaged Form. Bloodsacs blend seamlessly with the night sky. Creatures attempting to detect them suffer a -2 penalty to their Wisdom (Perception) checks, and they have advantage on Dexterity (Stealth) checks in dim light or darkness.

Surprise Attack. Bloodsacs often attack from behind. If a bloodsac surprises a creature, it has advantage on its first attack roll.

Weightless in the Void. Bloodsacs collapse into inert, sluggish heaps if exposed to gravity. On a planet or within a strong gravitational field, their speed is halved, and they lose their fly speed.

Multiattack. The bloodsac makes one Bore Attack and uses Brain Drain if a target is grappled.

Bore Attack. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 14 (2d10 + 3) piercing damage, and the bloodsac attaches itself to the target. While attached, the bloodsac deals 14 (2d10 + 3) necrotic damage at the start of each of the target’s turns. Removing the bloodsac requires a successful DC 15 Strength (Athletics) check. When forcibly removed, the target takes an additional 7 (2d6) necrotic damage.

Brain Drain. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature grappled by the bloodsac. Hit: The bloodsac deals 22 (4d10) psychic damage as it extracts the target's brain fluids. If this reduces the target to 0 hit points, the bloodsac gains the target’s memories for 24 hours. During this time, the bloodsac can perfectly mimic the victim’s speech patterns and surface-level knowledge.

Egg Implantation (1/Day). If the bloodsac has killed a creature, it may lay a clutch of eggs within the body. These eggs hatch after 1d6 days, releasing 3 1d6 juvenile bloodsacs.