REBORN! Choice Arc episode 167 (2010)

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As the Real Six Funeral Wreaths prepare for battle, Tsuna pays a visit to Lal Mirch. Afterwards, everyone puts on special mafia suits made from Leon's thread. They arrive at Namamori Shrine, where Shoichi has prepared a base of operations. However, Yamamoto and Hibari have yet to arrive. Byakuran appears, telling them they'll need to provide a massive amount of Dying Will flame energy to activate a teleporter to take them to the battlefield. Yamamoto and Hibari arrive at the last minute and, with their Vongola Boxes, the group manage to produce double the power needed.