Great Demon Emperor, Dudley Emperor "Яeverse"

:When your rear-guard is put into your deck during your battle phase, [lock one of your rear-guards], until end of turn, this unit gets +10000, and if your opponent's vanguard is grade 3 or greater, [discard a card from your hand], and this unit gets drive +1. :When this unit attacks, if you have no grade 2 or lower units, [ 1 & 1], search your deck for up to one normal unit, call it to an open , and shuffle your deck.