Stealth Beast, Instant Swapper

Shadowstitch-:[ 1 & Retire this unit] At the end of the battle that this unit attacked a vanguard, if that attack did not hit, you may pay the cost. If you do, search your deck for up to one card with the same card name as your vanguard, call it to , shuffle your deck, and at the end of that turn, put that called unit on the bottom of your deck.