Lady Battler of the Black Dwarf

:When this unit is rode upon by a grade 3 unit with "Messiah" in its card name, search your deck for up to one grade 3 card with "Messiah" in its card name different from your vanguard, reveal it and put it into your hand, and shuffle your deck. :At the end of the battle this unit attacked, if this unit was not unlocked this turn, lock this unit. If this unit was unlocked this turn, [ 1 & retire this unit], and draw two cards.