Flower of Ruined Castle, Empousa

[AUTO]Front Row (RC):When you [Soul-Blast 4] or more at the same time for the cost of your vanguard's ability, if your unit did not [Stand] by a card's ability this turn, you may [Stand] this unit. If you [Stand] this unit, at the end of that turn, [COST][retire this unit], choose a grade 2 or greater unit card from your soul, and put it into hand. (The end of turn effect can only be used if you [Stand] this card by its effect)