Froghemoth

A froghemoth's alien eyes allow it to perceive creatures within 30 feet, even if they are Invisible or ethereal. It can still be fooled by successful Stealth checks to Hide, but it has Perception DC 38 in such cases. It also sees through and is unaffected by illusions with the visual trait if they are within 30 feet.

This monster can see in all directions simultaneously and therefore can't be flanked.

Though a froghemoth is immune to electricity damage, it is Slowed 1 for 1 round whenever it would have otherwise taken electricity damage.

40 feet

A creature hit by the froghemoth's tongue becomes Grabbed by the froghemoth. The creature isn't Immobilized, but it can't move beyond the reach of the froghemoth's tongue. A creature can sever the tongue with a successful Strike against AC 31 that deals at least 15 slashing damage.

This deals no damage to the froghemoth but prevents it from using its tongue Strike until it regrows its tongue, which takes 1 minute.

The froghemoth makes up to four tentacle Strikes, each against a different target. These count toward the froghemoth's multiple attack penalty, but the multiple attack penalty doesn't increase until after all the attacks.

3d6+12 bludgeoning, DC 33 basic Fortitude

The monster deals the listed amount of damage to any number of creatures Grabbed or Restrained by it. Each of those creatures can attempt a basic Fortitude save with the listed DC. A creature that fails this save falls Unconscious, and a creature that succeeds is then temporarily immune to falling unconscious from Greater Constrict for 1 minute.

The froghemoth pulls a creature grabbed by its tongue toward itself. The froghemoth rolls an Athletics check against the creature's Fortitude DC. On a success, the froghemoth pulls the creature into an adjacent space, and if it critically succeeds it can also make a bite Strike against the creature after the pull.

Large, 3d6+9 bludgeoning damage, Rupture 24

The monster attempts to swallow a creature of the listed size or smaller that it has grabbed or restrained in its jaws or mouth. If a swallowed creature is of the maximum size listed, the monster can't use Swallow Whole again. If the creature is smaller than the maximum, the monster can usually swallow more creatures; the GM determines the maximum. The monster attempts an Athletics check opposed by the grabbed creature's Reflex DC. If it succeeds, it swallows the creature. The monster's mouth or jaws no longer grab a creature it has swallowed, so the monster is free to use them to Strike or Grab once again. The monster can't attack creatures it has swallowed.

A swallowed creature is Grabbed, is Slowed 1, and has to hold its breath or start suffocating. The swallowed creature takes the listed amount of damage when first swallowed and at the end of each of its turns while it's swallowed. If the victim Escapes this ability's grabbed condition, it exits through the monster's mouth. This frees any other creature grabbed in the monster's mouth or jaws. A swallowed creature can attack the monster that has swallowed it, but only with unarmed attacks or with weapons of light Bulk or less. The swallowing creature is Off-Guard against the attack. If the monster takes piercing or slashing damage equaling or exceeding the listed Rupture value from a single attack or spell, the swallowed creature cuts itself free. A creature that gets free by either Escaping or cutting itself free can immediately breathe and exits the swallowing monster's space.

Effect: Engulf and Swallow Whole

If the monster dies, a swallowed creature can be freed by creatures adjacent to the corpse if they spend a combined total of 3 actions cutting the monster open with a weapon or unarmed attack that deals piercing or slashing damage.

The monster can instead use Improved Grab as an action and choose one creature it's grabbing or restraining with an appendage that has Improved Grab to automatically extend that condition to the end of the monster's next turn.