Twisting the wind, MuAu 5
R:Touch, D:Sun, T:Ind (variant: R:Sight, D:Inst)
This spell changes the direction of a wind filling the sails of a sailing vessel the target is on, so that it propels the vessel forward, moving along with it until dusk or dawn. A variant of this spell, with R:Sight and D:Inst, can be used to suddenly change in the most unfavourable way the direction of the wind filling the sails of an enemy vessel within sight of the caster; while the effect lasts only a few heartbeats, it is often enough to cause serious trouble to the unwary, particularly if the wind is strong.
Base 3-1 [change one property of an amount of air], +1 Touch, +2 Sun (variant: +3 Sight)