Kilonova

Kilonova is a more powerful variant of the Supernova and is considered the most destructive due to its stellar-level explosion.

Overview
The user creates two energy spheres similar to the Big Bang Spirit Ball and before sending them upwards as they spiral around each other before colliding with each other and create a massive explosion of near stellar-level or exactly stellar-level proportions. Anything caught in the explosive wave will incinerated on contact or very burnt should the target survive.

Disadvantages
The use of this technique requires massive ki control and after using it; the user will have his power cut in half as result of the immense ki usage for the attack. The explosive wave also doesn't immediately disappear but instead continues to flew into the vacuum overtime making it possible for the user to injure themselves and close allies.

Due to the barrier around the Demon Realm; Dial doesn't use the technique as the explosive wave would never pass the barrier as he believes the Kilonova isn't enough to destroy it.

Enhancements
The effects of the Kilonova can be heighten should Dial opt to use Supernova energy spheres instead of Nova-level spheres. Doing so will speed the explosive wave on a noticeable level.