AUTO: When this unit is placed on Vanguard Circle or Rear-guard Circle, if you have a Murakumo Vanguard, you may pay the cost. If you do, search your deck for up to one card named "Stealth Fiend, Midnight Crow", call it to Rear-guard Circle, and shuffle your deck. At the beginning of that turn's end phase, return that unit to the bottom of your deck.