Purgatory Dragon Deity, Favrneel

:You may only have one "Purgatory Dragon Deity, Favrneel" in the deck. :At the beginning of your main phase, your opponent chooses one of their rear-guards, retires it, and if you did not ride this turn, this unit gets +10000/ +1. :When your opponent's rear-guard is retired during your turn, [put a card from hand into soul], and draw a card. :At the end of the battle this unit attacked, if the sum of the grades of 《Dark States》 cards in your soul is thirteen or greater, 2, this unit, and it gets drive-1 until end of turn.