If your deck lags behind the rest of the pod, these spells could be just what you need to force yourself over the finish line
This has worked exceptionally well with PSA cross to CGC, but has worked vice versa
the store opened, and in we went
Imagine cards like Bitterblossom, Jadar, Ghoulcaller of Nephalia, and Ophiomancer just saying create a Treasure every turn or upkeep. Its even an okay card in the face of a board wipe since you get more than enough mana to rebuild afterwards
In more multiplayer/EDH terms a super interesting political tool is to turn an opponent into a more desirable target, much like curses, and turn it into benefits for someone attacking a battle they dont own
Meanwhile, modern cards control rarity and value artificially through variants like Secret Rares or Rainbow Rares