The Beast Deities battle any opponent in a "fighting match".
[AUTO](VC)/(RC):When this unit's attack hits a vanguard, if you have a vanguard, look at up to five cards from the top of your deck, search for up to one card named "Beast Deity, Azure Dragon" from among them, reveal it to your opponent, put it into your hand, and put the rest on the bottom of your deck in any order.