Retrospective Dragon

:When this unit is placed on , if you have a vanguard with "Thegrea" in its card name, [ 1 & discard a card from hand], search your deck for up to one grade 3 or 2 set order, reveal it and put it into hand, and shuffle the deck. :At the end of the battle this unit attacked, [retire one other rear-guard], choose one of your units, and it gets +5000 until end of turn.