It's not a card that can't be used if you use it to prepare for a fatal weakness, but considering that this card must be laid down before the weakness is drawn and its ability value will decrease, it won't be able to do its job, so its practicality is low
cards, the value of Shaddoll Beast depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Structure Deck: Shaddoll Showdown)
(11/8/2024) A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way
Cards like Wrath of God or Damnation can turn a losing game into a winning one, so long as you play your other cards right
1x March of the Machine: The Aftermath