The Gulthoid Swarm

Legends tell of a time lost to history where Celestials chose to interceed in the endless war between Devil and Demon not with light or steel, but new monsters neither side could hope to stop. Through magic, alchemy, and darker sciences, these celestials created a new breed of abberation capable of draining life, evolving over time into even more battle-ready forms, and named them after the primordial vampire Gulthias. Of course, the loss of this knowledge speaks for itself: The celestials all perished at the hands of their creations, the weapon never deployed. Still, it may still exist, hidden at the edges of the multiverse.

A Homage

Gulthoids and their various forms were inspired by the Metroid species from the series of the same name, and particularly the evolved metroid forms from Metroid 2, the Metroid 2 Remake, and the fan-remake AM2R.

Final Notes

The Challenge rating for these creatures assumes that the flanking optional rule is in use and that the adventurers are provided a means of resistance to necrotic damage. If this is not the case, their necrotic damage should be halved or their CR slightly increased.

Larval Gulthoid Small Aberration, unaligned Armor Class 13

13 Hit Points 7 (2d6)

7 (2d6) Speed 0ft, fly 60ft. STR DEX CON INT WIS CHA 8 (-1) 12 (+1) 11 (+0) 2 (-4) 10 (+0) 3 (-3) Damage Immunities poison

poison Senses darkvision 30ft.

darkvision 30ft. Challenge 1/2 (50 XP) Malleable body. The gulthoid exists partially in the Ethereal realm, ignoring all damage. If it would be dealt cold damage, it loses this trait, is paralyzed and gains vulnerability to bludgeoning damage until the end of its next turn. Actions Bite. Melee Weapon Attack: +3 to hit, reach 5ft., one target. Hit: 1 piercing damage plus 7 (2d6) necrotic damage.