Cairn Linnorm
CREATURE 18Cairn linnorms are disturbing, even by linnorm standards. They make their homes in necropolises, burial grounds, and the sites of immense and gory battles. Some point out that cairn linnorms feast on shambling undead and thus provide a service to the living, but these beasts are not choosy and will happily consume any creature, whether or not it draws breath.
Some tales state that cairn linnorms will not-or cannot-enter a tomb without the permission of a descendant of the deceased (or the permission of the deceased itself, in the instance that it has risen from the dead). Likewise, once a cairn linnorm has entered a tomb, it won't leave until it has secured permission to do so. Whether such legends are true or not is anyone's guess; nevertheless, reports of a cairn linnorm in the vicinity are harrowing enough to dissuade even the most foolhardy grave robber from peeking into too many crypts or mausoleums.
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.
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.
Tail only
When a creature slays a cairn linnorm, it must succeed at a DC 44 Will save or become permanently Enfeebled 2. In addition, the victim ages at an accelerated rate, aging 1 year every day, eventually causing it to die of old age if the curse is left untended.
The cairn linnorm expels a 60-foot cone of void energy-infused acid, dealing 19d6 acid damage to creatures in the area (DC 40 basic Reflex save). The acid also saps the life out of affected creatures. At the beginning of the linnorm's next turn, each creature that failed the Reflex save must succeed at a DC 40 Fortitude save or become Drained 1 (Drained 2 on a critical failure).
The cairn linnorm can't use Breath Weapon again for 1d4 rounds.
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.