Glas Ghaibhleann

Deep within the twisted realm of Tir Na Nog, a massive beast is not born, but constructed. Bones of mana infused steel covered by thin, sallowed skin adorn the creature, its emaciated appearance deceptively hiding its horrifying strength. Long forgotten by those of the mortal realms, the tortured monstrosity awaits the call of its masters to reawaken it.

Ancient Siege Weapons. During the last reign of Cichol, Glas Ghaibhleanns were used heavily to not just break through the walls of cities, but to break the morale of those living inside. Easily standing almost fifteen feet tall when hunched over and over twenty feet tall when standing upright, Glas Ghaibhleanns are large enough to smash through most structures with ease and rip them apart with its four arms.

While appearing similar to the giants at a passing glance, the Glas Ghaibhleann is not of this world, and are summoned to it through an exhausting ritual that requires extensive construction of its massive skeleton. Only very experienced summoners have a chance of properly summoning this creature, and due to its feral nature, the skeleton must be heavily restrained prior to its summoning to prevent it from killing its summoners. In addition to the material requirements for its skeleton, the Glas Ghaibhleann consumes gold at a rapid pace, not needing air, food, or water due to its constructed nature.

Fickle Loyalty While the Glas Ghaibhleann can technically be summoned by any spellcaster with the proper experience and resources, the creature is never owned by the summoner. The creature is merely borrowed from Cichol, God of the Fomorians. Typically to complete the summoning, the caster must make a deal with the fickle deity, however due to the creature's nature it may still disobey if the caster goes back on their bargain or runs out of gold to feed its neverending hunger.

Glas Ghaibhleann's Lair

A Glas Ghaibhleann is typically summoned deep underground, as to accomodate a large space for not only the skeleton, but also the restraints required for the summoning.

Lair Actions

On initiative count 20 (losing initiative ties), the Glas Ghaibhleann takes a lair action to cause one of the following effects:

-The Glas Ghaibhleann causes a necrotic mist to rise from the ground of the lair. This is considered difficult terrain and any creature attempting to maintain concentration within the mist must make a DC 16 Constitution saving throw in order to maintain concentration. The Glas Ghaibhleann and the gargoyles summoned by it are unaffected by the difficult terrain.

-The Glas Ghaibhleann consumes raw gold present within the lair. The Glas Ghaibhleann regains 30HP by doing this.

-The Glas Ghaibhleann strikes the supports that were holding its restraints with its swords. The support beam falls on the ground in a 5ft wide, 20ft long line. Any creatures caught below the support must make a DC16 Dexterity saving throw to avoid the support beam. If the saving throw is failed, the creature takes 18(4d8) bludgeoning damage.

Regional Effects

The lair of a Glas Ghaibhleann is typically dark and secluded, appearing barren as the minerals and resources have been stripped out of the earth by either the creature, summoner, or both. One of the most common site to summon a Glas Ghaibhleann is deep within a gold mine, having the local townspeople unwittingly gather the resources for the summon.

-Gargoyles may magically appear in numbers of 1 to 6 in a 5 mile radius around an already summoned Glas Ghaibhleann. These gargoyles will automitcally be hostile.

-The Glas Ghaibhleann exudes a psychic aura, able to subjugate lower intelligence creatures including humans to bring it gold, however it cannot do any more than this. If summoned using the example above, the town it is underneath will typically be stricken with poverty.

-Fomorians have a rare chance to appear within the area, being summoned through portals in a 2 mile radius around the lair. In order to determine presence of Fomorians, roll a d100, and if the result is lower than 15, a single Fomorian will appear through a portal to Tir Na Nog. The portal closes immediately after the Fomorian successfully crosses over.

When the Glas Ghaibhleann dies, these effects fade immediately, except for the poverty, which takes 1d12 years to recover.

Credit: Mabinogi Wiki