So, I pretty violently disliked the game when I read the SRD, for reasons that had nothing to do with the Flashback mechanic, and I haven't looked at the rules in probably at least a year: My recollections of rules are ... at best, spotty. I sincerely hope any errors below are corrected by folks with more/better knowledge of the relevant mechanics.It seems reasonable to me, though, that the player could, knowing now that a cleric is present, have a flashback and during the planning phase, plan to use his ring of protection to help with spells such as Hold Person. That seems very plausible for what the character could have accomplished. What am I missing?
That said, Flashbacks have a cost that is roughly equivalent to damage (Stress reflects many things, IIRC). So, you're literally hurting yourself to do it. Also, while the game doesn't focus specifically on what an individual character is carrying, there is a focus on loot, and it seems plausible you can't just decide you have a selection of rings to choose from. Also, what you're doing in a flashback is either altering how bad a bad outcome can be or how likely a good outcome can be, and in either case the outcome is derived from your action. As with PbtA games, the GM never rolls for outcome or damage (I think there's the option for the GM to roll instead of deciding).
Seriously, it's not the violent retcon some people in the thread seem to think it is.