Gegnir

Constant Spells — A constant spell affects the monster without the monster needing to cast it, and its duration is unlimited. If a constant spell gets counteracted, the monster can reactivate it by spending the normal spellcasting actions the spell requires.

All-Around Vision — This monster can see in all directions simultaneously and therefore can't be flanked.

Regeneration 40 (Deactivated by Acid or Fire) — This monster regains the listed number of Hit Points each round at the beginning of its turn. Its Dying condition never increases beyond Dying 3 as long as its regeneration is active. However, if it takes damage of a type listed in the regeneration entry, its regeneration deactivates until the end of its next turn. Deactivate the regeneration before applying any damage of a listed type, since that damage might kill the monster by bringing it to Dying 4.

Attack of Opportunity —

Catch Rock —

Head Regrowth — Gegnir has nine heads, and he can use regeneration to regrow a head that is severed from an effect like a vorpal weapon. After regaining Hit Points from regeneration, the jotund troll attempts a DC 8 Flat. On a success, one missing head is fully restored; on a critical success, two missing heads are fully restored. If Gegnir loses his last remaining head, he dies immediately.

Multiple Opportunities — A jotund troll gains an extra reaction per round for each of their heads beyond the first, which they can use only to make Attacks of Opportunity with their jaws or to Fast Swallow. They can't use more than 1 reaction for the same triggering action, even if a creature leaves several squares within their reach, and the jotund troll must use a different head for each Attack of Opportunity they make. Whenever one of the jotund troll's heads is severed, the troll loses 1 of their extra reactions per round.

Cacophonous Roar (auditory, emotion, incapacitation, mental, primal) — Gegnir emits a cacophonous roar from all his heads with a mystical power that distorts the listener's mind. Each non-troll creature within 100 feet must attempt a DC 42 Will save. Gegnir can't use Cacophonous Roar for 1d4 rounds.

Critical Success The creature is unaffected and is temporarily immune to Cacophonous Roar for 24 hours.

Success The creature is Stupefied 1 for 1 round.

Failure The creature is Confused for 1 round.

Critical Failure The creature is confused for 1d4 rounds.

Fast Swallow —

Gut Tug — Gegnir's intestines slither back into his body, pulling a creature Grabbed by his intestines toward himself. Gegnir rolls an Athletics check against the creature's Fortitude DC. With a success, he pulls the creature into an adjacent space, and if he critically succeeds he can also make a jaws Strike against the creature after the pull.

Intestinal Tether — A creature hit by Gegnir's intestine becomes Grabbed. The creature isn't Immobilized, but it can't move beyond the reach of Gegnir's intestine. A creature can sever the intestine with a successful Strike against AC 41 that deals at least 20 slashing damage. This deals no damage to Gegnir but prevents him from using his intestine Strike until he regrows his intestine, which takes 1 minute.

Ravenous Jaws — Gegnir makes a number of jaws Strikes up to his number of heads, each against a different target. These attacks count toward the troll's multiple attack penalty, but the penalty doesn't increase until after he makes all of these attacks.

Rend — Claw

A Rend entry lists a Strike the monster has.

Requirements The monster hit the same enemy with two consecutive Strikes of the listed type in the same round.

Effect The monster automatically deals that Strike's damage again to the enemy.

Swallow Whole (attack) — Medium, 4d12+10 bludgeoning damage, Rupture 40

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.

Throw Rock — The monster picks up a rock within reach or retrieves a stowed rock and throws it, making a ranged Strike.

Grab —