The Oath Flame is a combination of both the Earth and Sky Flames, forming an extremely powerful Dying Will Flame.
Overview[]
Created when the Earth Simon Ring and the Ring of the Sky Version X fused together, the Oath Flame possesses both the Sky Flame's Harmony and the Earth Flame's Gravity.
Usages[]
Tsunayoshi Sawada has utilized the Earth Flame's ability to manipulate the gravity of different objects in order to keep his shattered bones in place, essentially creating a reinforced skeleton.
He's can also use the Earth Flame's Gravity to slow down and even immobilize his opponents, although the Flame of Night has been shown to be capable of countering this, as shown in Tsuna's battle with Demon Spade.
Another advantage granted to Tsuna by the Oath Flame is that of being able to fire off the X-Burner immediately without having to spend time balancing the Flames.
Tsuna's use of this Flame is possible because of his own Flame's characteristics and his natural ability to understand other Flames.