Sources
CR
Type
Size
Alignment
Movement

Maw of Sekolah

Huge Monstrosity, Neutral Evil

Armor Class 12 (natural armor)
Hit Points 114 (12d12 + 36)
Speed 0 ft., swim 50 ft.
STR
21
+5
DEX
12
+1
CON
17
+3
INT
2
-4
WIS
14
+2
CHA
7
-2
Saving Throws STR +8, CON +6
Skills Athletics +8, Perception +5
Senses darkvision 120 ft., passive Perception 15
Languages Sahuagin, telepathy 100 ft.
Challenge 7 (2,900 XP)

Traits

Legendary Resistance (2/Day). If the maw of Sekolah fails a saving throw, it can choose to succeed instead.

Water Breathing. The maw of Sekolah can breathe only underwater.

Actions

Multiattack. The maw of Sekolah makes one attack with its bite and one attack with its tail smash.

Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit:16 (2d10 + 5) piercing damage.

Tail Smash. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit:9 (1d8 + 5) bludgeoning damage.

Legendary Actions

Detect. The maw of Sekolah makes a Wisdom (Perception) check.

Speed of Sekolah. The maw of Sekolah moves up to its speed.

Feed (Costs 2 Actions). The ferocious spirit of Sekolah flashes through the water, tearing through the foes of the maw of Sekolah. Each creature of the maw's choosing within 60 feet of it must make a DC 16 Dexterity saving throw, taking 7 (2d6) slashing damage on a failed save, or half as much damage on a successful one.

Lore

Summoned from the shadowy depths of the ocean through ritual and tidal magic, the Maw of Sekolah appears in The Final Enemy as the avatar of the hungry sahuagin god. This huge, two-headed shark is fed a steady diet of sentient creatures, captured by the sahuagin and offered up as tribute. Sahuagin priestesses adorn the fins of the maw of Sekolah with gemmed bands and polished skulls.