uncommon ne gargantuan aberration aquatic 

Perception +38; darkvision

Languages Aklo, Lomos, Aquan, Undercommon; telepathy 100 feet, tongues

Skills Athletics +36, Deception +40, Occultism +43, Stealth +40, Survival +36

Str +6 Dex +10 Con +7 Int +10 Wis +6 Cha +7

AC  43; Fort +30, Ref +36, Will +38

HP 400

Speed 10 feet, swim 80 feet

Melee [>] jaws +39 (agile, deadly 3d10, finesse, reach 15 feet), Damage 4d12+18 piercing plus Improved Grab

Melee [>] lure +37 (agile, finesse, magical, reach 40 feet), Damage 4d6+18 bludgeoning plus 2d6 mental and beguiling lure

Occult Innate Spells DC 41; 10th fabricated truth, gate (at will); 9th telepathic demand (×2), unfathomable song (×2); 8th illusory creature (×2), phantasmal killer (×2); Cantrips (9th) dancing lights, daze; Constant (9th) tongues

Beguiling Lure (illusion, mental, occult, visual) A creature hit by a lophiithu's lure must succeed at a DC 41 Will save or be fascinated with the lophiithu's lures for 1 minute. On a critical failure, it can't use reactions while it remains fascinated. A creature that succeeds at its save is temporarily immune for 1 hour.

Dimensional Swallow The lophiithu's digestive organs exist in the Maelstrom, regardless of the location of their external form. The lophiithu can swallow any number of creatures of any size. Creatures that Escape the lophiithu's stomach do so normally. Creatures that cut themselves free instead find themselves in the Maelstrom near nothing but one of the lophiithu's disembodied stomachs. When the lophiithu dies, their stomach becomes a rift connecting to their mouth, allowing a creature to return to their plane. This rift disappears after 1 minute.

Lure Whip [>>] The lophiithu makes a lure Strike against each creature within reach. These attacks count toward the lophiithu's multiple attack penalty, but the penalty doesn't increase until after these attacks.

Swallow Whole [>] Gargantuan, 3d12+10 bludgeoning, Rupture 44 and dimensional swallow.

Fists of the Ruby Phoenix #3: King of the Mountain, page 83.