What It Does
A jet of water, drawn in a line and let go. It cuts, it dowses, it finds the gap — the water is the one who is still standing, and the water does not stop, and the water finds the way.
The Cost
Circle 1 · Water · Exchange: gesture — casting time one beat. The Exchange is the gesture rung on the ladder in The Veil: the spell costs exactly as much as the spell is, and the meter pays the budget, not the cost.
The Failure
Vague intent makes a vague thread — the water cuts, and the water cuts the wrong thing, and the wrong thing is the line.
In Stories
The camp's first water spell, the one the new arrival casts when the thirst is the argument and the ground is the one who has to drink.
The door's scale anchor is Tidecaller, who casts it the way a hand casts a shadow — which is how a reader knows the shape of the thing, because the dragon does not think about it.