AC 17 (natural armor)
HP 90 (12d10 + 24; bloodied 45)
Speed 40 ft., climb 40 ft.
Proficiency +3; Maneuver DC 16
Skills Stealth +5
Damage Resistances damage from nonmagical weapons
Senses darkvision 60 ft., passive Perception 12
Languages —
Camouflage. The grick has advantage on Stealth checks made to hide in rocky terrain.
Spider Climb. The grick can use its climb speed even on difficult surfaces and upside down on ceilings.
ACTIONS
Tentacles. Melee Weapon Attack: +8 to hit, reach 20 ft., one or two targets. Hit: 23 (4d8 + 5) bludgeoning damage, and if the target is a creature it makes a DC 16 Strength saving throw . On a failure, the creature is pulled to within 5 feet of the grick and grappled (escape DC 16). Until the grapple ends, the creature is restrained . The grick can grapple up to two Medium or smaller creatures or one Large creature.
BONUS ACTIONS
Beak. Melee Weapon Attack: +8 to hit, reach 5 ft., one creature grappled by the grick. Hit: 14 (2d8 + 5) piercing damage.
Combat
The giant grick usually lurks 20 feet up on walls and ceilings. If it can, it waits for two creatures to be within 20 feet of it before it springs its ambush. It reels its victims in, often pulling them up into the air, and gnaws them with its beak. If it’s reduced to 20 hit points or fewer, it releases its victims and tries to escape.
Legends and Lore
With an Arcana or Nature check, characters can learn the following:
DC 10: Gricks are dangerous, subterranean ambush predators. Travelers in remote caverns must watch the walls and ceilings.
DC 15: Gricks are an invasive species from another plane, but with their natural camouflage and ability to see in the dark, they are perfectly adapted to life underground.
DC 20: There is a strange plant variant of the grick that looks like a giant flower.
Gricks keep growing as they age, their coiled tentacles becoming longer and tougher. The largest gricks are often surrounded by several of their smaller spawn.
Behavior
1–3 Clinging motionless to a wall, ledge, or ceiling
4 Hiding behind debris, rubble, or furniture
5 Devouring its last victim
6 Guarding the entrance to a grimlock cave
1 Scattered bones
2 DC 12 Perception check: sucker marks on stone
3 DC 12 Perception or Investigation check: signs of a body being dragged
4 A gossamer-thin shed skin
Gricks hunt in caverns and other rocky areas.
CR 0–2 grick
CR 3–4 2 gricks ; grick and gibbering mouther or mimic ; grick and 1d4 grimlocks
Treasure 150 gp, 250 sp, writing supplies, incomplete bestiary (75 gp)
CR 5–10 giant grick ; giant grick and 2 gricks
Treasure scattered supplies (100 gp), saddle bags containing 200 gp and 30 pp