Bad Moon is a super-basic effect, but you have alternative options like Ascendant Evincar, or any of the black-adjacent Liege creatures like Ashenmoor Liege
Barring something unfortunate like that, Id likely find room in the 99 for some number of other ways to create Saprolings
[18] Starter decks, which are part of the Magic product line, are aimed at giving novice players ideas for deck construction
Fork + Twinferno + Reverberate + Twincast The classic Fork has seen many iterations, with some functionally similar cards including Twincast, Reverberate, and Twinferno, though none of these change the color of the copied spell
Trading lands for cards or extra drops gives value early, but once fully powered, it drains opponents whenever you sacrifice lands