Considering that Ancalagon is a 100ft away, he knows he is well out of range of the spell. He leaps onto the wall, being behind the fang dragon, and casts a dispel magic and a quickened fireball, before jumping back down, as the spell blows up underneath the dragon, the fire from it lashing at her stomach, and hopefully he is hidden well enough he does not need to worry about being found.<br/><br/>[Dispel = 30<br/>Quickened fireball = 36]