Lava Release: Expanding Flame Rings

The user expands a ring of melting flames, which can be sealed inside a projectile to melt it and change it into a spiral shape. The sealed flames then cause a high-pressure shock wave that melts the projectile and explodes in a storm of flames.
fr:Yôton - Expansion d'Anneaux de Flamme
pt-br:Anel de Chamas