Components: V, S, M (a tiny candle)

Casting Time: 1 action

Duration: Concentration, up to 1 hour

Range: 200 ft.

Area of Effect: 1 ship

Saving Throw: None

The mainsail of one ship you can see becomes insubstantial for the duration of this spell. The loss of a mainsail reduces the ship’s speed by a percentage equal to the sail’s percentage of the ship’s total sails. On many smaller ships, this will be 50% or more. On larger ships, it always reduces the ship’s speed by at least 25%.