What makes it weaker than other epic spells is how specific your deck has to be built in order to actually ensure you can close games out once you cast Undying Flames
Unsurprisingly, thanks to the obscene demand for this crossover, many of the sets MTG cards are insanely expensive
Then your nonlands in your graveyard have retrace, so you can discard that land you Regrowthed or what you drew naturally and then cast the nonland and get it back onto the battlefield
It provides a stable base of destruction and control
The key value drivers: Why edition, condition (grading), language, and foil/non-foil can have a massive impact on priceand why demand ultimately trumps everything else
This comprehensive audit includes an accompanied inventory, during which the entire inventory of collectibles is checked for their existence