Magic That Turns Sweet Grapes Into Sour Ones

(After a set order is played, put it in the order zone)
[CONT]:You may only have one "Magic That Turns Sweet Grapes into Sour Ones" in a deck.

Play this with [COST][Energy-Blast 2] if you have a vanguard with "Frieren" in its card name!
[AUTO]:When this card is put in the order zone, choose a card from your hand, and you may discard it. If you discarded a card, choose a non-sentinel grade 2 or less normal unit or an order card without Regalis Piece from your drop, and put it into hand.