Battle Monk of Water Scales, Ryuutou

:When this unit boosts a vanguard, if your opponent's vanguard is grade 3 or greater, this unit gets +5000 until end of that battle. :When the attack this unit boosted hits, [retire this unit], and 1. :At the end of the battle this unit boosted, 1 & retire this unit], search your deck for up to one card with the same card name as your vanguard, reveal it and put it into hand, and shuffle the deck.