A whirlwind spell is a powerful incantation that conjures a contained cyclone of wind. This is a form of elemental magic that controls Air and Wind. Merlin used such a spell – with the incantation "Cume þoden" ("I summon the wind") – to drive off Kanen's force of brigands during the Battle of Ealdor (The Moment of Truth). It was actually revealed, in the audio commentary of Ep.7, that Morgana was on the verge of dying from this spell and about to enter the Spirit world, but Morgause saved her by giving her a coin that would bring her back to the world of the living.