Whirlwind spell
A Whirlwind Spell is a powerful incantation that conjures a contained cyclone of 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)
Merlin used other spells that involve the element of Air and Wind: one to defeat the Afanc (The Mark of Nimueh, "Lyft is þe in bǽlwielm ac forhienan se wiðere") and one to summon
Merlin stops the poisonous smoke.
the mist (The Nightmare Begins, "Bene læg gesweorc"). He also cast a spell to protect himself from a poisonous smoke release by a trap in the Tomb of Ashkanar ("Þrosm tohweorfe") (Aithusa).
Merlin, disguised, with the help of an Aging Spell, as "Dragoon the Great", when to Morgana's hut to kill the Fomorroh that was controlling his mind. The warlock and the witch engaged in a magical battle in which they both used Stunning Spells to knock each other out. Morgana seemed to emerge victorious but Merlin gathered his magical strength and summoned a terrible whirlwind, against which Morgana was defenseless. The incantation Emrys used was: "Ic her aciege anne windræs! Færblæd wawe! Windræs ungetermed - ge hiere! Ic ðe bebiede mid ealle strangnesse ðæt ðu geblæwest ond sierest strange! Ge spurne þeos hægtesse!" Morgana was sent flying away and knocked unconscious, possibly badly wounded. (A Servant of Two Masters).