Tainted Draughts

Whoever drinks for the clay jars offered by the priests of the Tree of Sorrows will enjoy several benefits for one season - however, the side effects of these concoctions are permanent. People who drink these too often will die a very painful death, tree roots will burst out of their stomachs and if their corpses are not burnt they will transform into wicked trees. If they listen to the lure of the Tree of Sorrows and return to its lands before it is too late, they can instead of dying become its guardian turning into a monster reminiscent of Thinir. There is no way to avoid this fate if your lips touch the potions.