Medium Aberration, unaligned
Armor Class 12
Hit Points 60 (8d8+24)
Speed swim +60, walk +20
Challenge 2
Skills perception +1
Damage Resistances acid, cold
Senses darkvision 60', passive Perception 13
Languages —
Frozen to the Spot. When on snow or ice the birgemon seal can't be moved vs. its will.
Hold Breath. Can hold its breath for 90 min.
Multiattack. One Bite attack one Toothy Maw attack and three Tendril attacks. It can replace all three Tendril attacks with use of Reel.
Bite. Melee Weapon Attack: +4 to hit, 5 ft., one target, 7 (2d4+2) piercing damage.
Toothy Maw. Melee Weapon Attack: +4 to hit, 5 ft., one target, 9 (2d6+2) piercing damage.
Tendril. Melee Weapon Attack: +4 to hit, 15 ft., one target, The target is grappled (escape DC 13) if it is a Med or smaller creature and the seal can't use the same tendril on another target. If a creature is grappled by two or more tendrils it is also Restrained.
Reel. Pulls each creature grappled by it up to 10 ft. straight toward it.
Ice Slide. If the birgemon seal moves at least 10 ft. in a straight line while on snow or ice during its turn it can slide up to 40 feet.
Source: Tome of Beasts 3 · OGL/Open