I am aware that if I apply my own Past in FlamesShaman's Trance does not apply to all the spells in my opponents graveyards because my PoF can't modify the cards not in my own graveyard.
However if an opponent had a graveyard full of spells and a past in flames could I cast Trance and then flashback their PoF to apply flashback to their graveyard of spells in the most niche situations possible?
No. You would still be the one casting and thus controlling the spell, so "your graveyard" still refers to your own graveyard, even though the spell came from someone else's.
However if an opponent had a graveyard full of spells and a past in flames could I cast Trance and then flashback their PoF to apply flashback to their graveyard of spells in the most niche situations possible?
Former Rules Advisor
"Everything's better with pirates." - Lodge
(The Gamers: Dorkness Rising)
"Any sufficiently analyzed magic is indistinguishable from science."
(Girl Genius - Fairy Tale Theater Break - Cinderella, end of volume 8)