碧牙の重轟爆速竜 Blue Tooth Concurrent Burst Dragon (Blue-Fang Concurrent Burst Dragon)

Note: The Kanji reads roughly as Blue Fang’s Layered Rumble Burst Speed Dragon.

It’s cited as being a new ace monster designed to enhance Yuamu Decks (i.e. Decks with Blue-Fang and Red-Boot)

Source: Saikyo Jump