Adaptive Fangs. The halog magically alters its fangs to inflict more damage on the creatures it hits (included in the attack).
Magic Resistance. The halog has advantage on saving throws against spells and other magical effects.
Pack Tactics. The halog gains advantage on attacks targeting creatures adjacent to one or more of the halog's conscious allies.
Multiattack. The halog makes two Bite attacks.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit:12 (3d6 + 2) piercing damage plus 10 (3d6) damage of a type that the target is most vulnerable to.
Adaptive Hide. After taking damage, the halog is now invulnerable to the damage type of the damage it just took, and any future damage of that type instead heals the halog by the damage amount. These benefits last until the halog uses this reaction again.
There are few places more inhospitable than the Nine Hells, yet denizens from other places make a home even here. Not only the evil whose philosophy aligns with the devils, but simple creatures whose endurance and appetites permit them to survive the infernal realms. Often this means huge monsters strong enough to fight the native denizens, but some intruders pose a different kind of problem to the devils. Halogs seem small and weak compared to almost everything in the Nine Hells, yet they're…