yugioh tag force 4 all cards Regretful Rebirth (5D's 4) [TF04-EN003] Ultra Rare – Anubis Games and Hobby Yu-Gi-Oh Card - TF04-EN001 -

Do you pay the 100

(Scryfall note) "Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." (2025-06-06) You must still follow any timing restrictions and permissions, including those based on the card's type

I remember a spearow and a couple other c/u cards

Its always on, and if a creature with toxic deals damage then the poison counters are inflicted without a trigger and without using the stack