Aclazotz, Deepest Betrayal Momo, Friendly Flier Momo, Playful Pet Momo, Rambunctious Rascal Wingnut, Bat on the Belfry Zoraline, Cosmos Caller
Like most Magic: The Gathering cards, the value of Big Score depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secrets of Strixhaven Mystical Archive)
You can ignore that effect for one turn if you pay two mana, but thats a hard thing to do when youre sat on a hand full of fetchlands
Power Packs will allow collectors to purchase digital packs that contain a PSA-graded trading card
A 2/1 also trades off with enough stuff that this elf scout might just die naturally and put you up a land for your efforts
This eventually grows Rielle into a big threat that can be your win condition, and you can play cards like Crackling Drake to complement this strategy