At the big picture level, all Ill say is that this surplus of efficient removal has made it very very hard to dominate early game with raw tempo, as your opponent can likely respond and pick apart whatever cheap creature rushdown you had cooking
The front fetches one for you, from various zones, and the back is an enchantment that copies any instant or sorcery you cast
Luckily, you wont run the risk of locking yourself out of your graveyard, because you can sacrifice Festival of Embers at any time for two mana
OP-11 contains 2 Secret Rare cards
Relevant creature types and combat keywords to boot
A buyer who only collects Rare cards from the Fossil set can filter down to exactly those cards, which is the kind of browsing experience I'd always wanted to offer buyers and could now actually build