Gargantuan monstrosity, unaligned
Armor Class 17 Natural Amor
Hit Points 279 (18d20 + 90)
Speed 15 ft., fly 80 ft.
STR
29 (+9)
DEX
7 (-2)
CON
20 (+5)
INT
3 (-4)
WIS
11 (+0)
CHA
8 (-1)
Saving Throws STR +15, CON +11, WIS +6, CHA +5
Skills Perception +6
Damage Resistances Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Adamantine
Condition Immunities Exhaustion, Paralyzed, Petrified, Poisoned
Senses Darkvision 60', Passive Perception 15
Languages --
Challenge 17 (18,000 XP)

False Appearance. While the roc lobster remains motionless, it is indistinguishable from a craggy outcropping or a small field of boulders.

Keen Sight. The roc lobster has advantage on Wisdom (Perception) checks that rely on sight.

Magic Resistance. The roc lobster has advantage on saving throws against spells and other magical effects.

Roc, Paper, Scissors. The roc lobster has advantage on attack rolls made against scissors lizards, flying swords, or any other creature that possesses anatomical blades.

Actions

Multiattack. The roc lobster makes three attacks: one with its beak and two with its pincers. It can replace either pincer attack with a talon attack if the pincer is grappling a creature.

Beak. Melee Weapon Attack: +15 to hit, reach 10', one target. Hit: 27 (4d8 + 9) piercing damage.

Pincer. Melee Weapon Attack: +15 to hit, reach 5', one target. Hit: 23 (4d6 + 9) bludgeoning damage. The target is grappled (escape DC 22). Until this grapple ends, the target is restrained, and the roc lobster can’t use that pincer on another target.

Talon. Melee Weapon Attack: +15 to hit, reach 5', one target. Hit: 23 (4d6 + 9) slashing damage.

Ejahli