What It Does
A point of venom, set in the wound — the venom is the delivery, and the delivery is the whole argument, and the wound goes where the hunter points it. It is the cantrip of the school: the fang does not make the water bad, the fang decides who drinks.
The Cost
Circle 1 · Venom · Exchange: gesture — casting time one beat. On the ladder in The Veil, the gesture rung is the price.
The Failure
The point is set in the wrong wound — the venom is the one who delivers, and the one who is delivered to is the one who was not meant to drink.
In Stories
The camp's first venom spell; the one the serpent-folk cast when the fang is the argument and the address is the one who has to drink.
The door's scale anchor is Venomfury — the dragon casts it without thinking, which is how a reader learns the shape of the thing.