Ettir - More of a problem at present

Ettir's something from Norse myth that I thought suited the Grey Waste, especially as a component in Night Hag rituals, as well as something to help fight the Fade and create warped monstrosities like the Forest of Irmine Sul. Other than the example given below however, I'm not sure how to proceed rules wise. Any ideas would be appreciated (including "don't worry about the rules for now")

Ettir (Viridian Bile)

Drops of poisonous ettir festered and bubbled, and grew into the giant Ymir.
It begat the families from which all giants came, which is why those kin are all wicked and given to feuds.

- From an ancient bariaur legend

Ettir is vicious and ettir is vile, but in the ever-sapping Glooms even these qualities can be prized as a medicine. Ettir is the name given to this slime in the history of the Norse Powers, who say that it was the substance that first brought life to the Multiverse. In the lower planar trade tongue it is known as Viridian Bile.

Ettir is a sticky and foul smelling poison, blue-green in colour, acrid stinking, and thicker than blood. Small pools of the stuff can be found across the Wastes, and although never common it is found mostly on Oinos. The relatively abundant flora of the layer, particularly the deadly Field of Nettles and the bloated roots of the forest of Irmine Sul, are often attributed to the effects of this terrible substance, for it twists living things and spurs them to unnatural growth. Viridian Bile is a fiery poison, an infusion of which makes the blood seem to boil and the flesh feel like its burning. The smallest contact can be lethal to mortal and exemplar alike, and rumour claims that even Powers can be affected by it, if distilled to sufficient potency. Norse legend says that ettir formed in the primal void before the multiverse, when elemental fire and ice met and clashed for the first time. Its power is said to have formed both the giant Ymir and Odin himself. Some greybeards suspect that the substance is raw liquid existence, some kind of runoff formed by the first meeting of positive and negative energies when the multiverse was formed.

Although it kills almost all those who are subject to it undiluted, a heavily-watered down compound of ettir can invigorate a body with fiery pain that helps counteracts the Fade. But prolonged exposure or repeated doses also inflict an unnatural fecundity upon living things, twisting them into hideous and pained, but powerful and vigorous abominations. Plant, animal, and exemplar alike can be affected, and some greybeards’ suspect that traces of the substance may be involved in changing larva into hordlings, and the life cycle of Night Hags. The grey sisters certainly seem to prize the substance, carefully harvesting even the smallest of droplets for use in their cauldrons. Adventurers will encounter it most commonly as Oinos-nettle tea, made with a miniscule amount of ettir and sold by night hags as a tonic. The tea is bitter tasting and painful, combining the effects of fever, muscular aches, and a hangover. All these things help stir the drinker from the drain of the Waste, granting him additional resolve to fight the Fade. Unfortunately a user already numbed by the Wastes can come to crave the painful sensations that ettir produces. They also need more and more of the substance to awaken them from numbness, which leads inevitably to side-effects. Addicts can be found in many settlements on the Waste, mixing ever-increasing ammounts of ettir with tea, strong liquer, tobacco, adn other drugs.

Repeated exposure to raw ettir (or great quantities of it diluted) causes unnatural changes in living things, be they mortal or outsider. Creatures who consume small does of Ettir regularly (such as the tea) may suffer no more ill effects than barreness, or having offspring who are tieflings. Greater consumption however, can have a terrible price: The body swells with agonised, unnatural growth: Deformity; Gigantism; vestigal limbs; and muscles swollen powerful but crude. These transformations can often be ‘beneficial’ in a savage way, but are always hideous to behold and constantly painful to the bearer. In extreme cases, these mutations can result in death.

Ettir can be harvested raw by berks looky enough to come across a few droplets in the wilderness, but is far more commonly procured from the grey sisters. As well as the tea (which most hags are rarely without a few bags of), the daughters of Cegliune mix the substance in their cauldron-incantations as well as distil it for sale. Spells of pain and twisting benefit from the inclusion of ettir in their components, but it is used mundanely too: Both sides in the Blood War procure ettir-laced spirits for their soldiers, to keep them alert and free of the Fade. Poison containing it can be obtained for those wishing to corrupt the body of an unborn child, or to make some wrongful mating fruitful against all the laws of nature. Liches - and prospective liches - also sometimes buy the stuff, which is reputed to invigorate even the dead with it pain.

Uses of Ettir

Note: None of these bonuses against the Fade are cumulative.

Ettir Nettle Tea
Poison, ingested (no save)
Cost: 10gp
Effects: 1pt temporary CON damage, +2 to saves versus the Fade for 24 hours.

Ettir-paste, blade venom
Poison, contact (save DC 15)
Cost: 400gp
Effects: 2d12hp/2d3 Con - character's who fail their save versus the Secondary damage gain a +2 bonus to saves against the Fade for a number of days equal to the CON points lost.

Refined Ettir-laced Incense
Posion, inhaled (save DC 25)
Cost: 7,000gp
Effects: 1d8 CON/1d8 CON damage. Otherwise treat as a Stinking Cloud spell but make only one Saving Throw for all effects. Characters gain a +2 bonus to saves against the Fade for a number of days equal to the CON points lost.