It could have just triggered when an opponent targets Gargos
These are not legal to play in tournaments, but some are worth $10 or more as collector's items
4 Lugia Ex Team Plasma Full Art - $103.71 Lugia EX is another card with plenty of blue on it
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Snapcaster Mage: "Flashback [cost]" means "You may cast this card from your graveyard 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." (2021-03-19) You must still follow any timing restrictions and permissions, including those based on the card's type

Now, my problem with [casthaven]Furance of Rath[/casthaven] effects is that I really only ever see them seeing play in one of two different style decks: either hyper-aggro/commander damage decks that use them as overruns, or in damage combo decks that use these doublers with cards like [casthaven]Stuffy Doll[/casthaven], [casthaven]Mogg Maniac[/casthaven], or [casthaven]Repercussion[/casthaven] to quadruple spells like [casthaven]Blasphemous Act[/casthaven] for a fairly instant combo kill
These sets are filled with all sorts of reprints from the past few expansions and often bring a fun twist to some of your favorite Pokemon