|English||Blazing Heat in the Sky|
|Debut (Manga)||Chapter 159|
Ourania Phlogosis is a High Ancient Fire-Element spell that summons a massive blast of flames to attack. The spell has a long verse, magical energy charging throughout the course of the incantation. Once the aria is completed, a massive area-of-affect firestorm is unleashed, causing extremely high-temperature flames to engulf and incinerate the targeted area. Even when Negi Springfield had set his magical barrier to maximum, he still received damage from the blaze; however, it should be noted that Chao had not been able to charge the spell with its full potential.
Recited in Ancient Greek, the composition of the spell's incantation is similar to that of Kosmikê Katatrophê used by Evangeline, indicating that it is the King-level, the most powerful of the Fire element spells (it beseeches the "Tyrant of Flame", a tyrant being a form of ruler). However, as increasing the temperature does not violate the Third Law of Thermodynamics as Kosmikê Katatrophê does, this spell is thus considered slightly less advanced than Evangeline's. It is also unclear if this spell has an inherent area-of-affect or needs to be targeted, as Chao focussed the spell into a single stream to attack with concentrated force.