Sapphire contains a wide variety of spells and abilities that enable many strategies found in Lorcana
Rakdos Charm is the perfect antidote to this kind of problem (although not the specifically the Moat one...), it can deal with a selection of troublesome things while remaining useful outside of this scope and perfectly maindeckable without fear of having dead cards or losing much consistency
Some cards, like Mycosynth Golem and Tezzeret, Master of the Bridge, can give affinity to spells that already have affinity
Now we'll take our budget list and beef it up a bit with some pricier cards, several of which are from the main Duskmourn set (as I'm writing this during preview season, some of these new cards may be budget-friendly once prices drop after release)
While you might think that the fact this planeswalker forces her controller to discard a card as well wouldn't make this card very good, you would be entirely wrong
The prices for this list come from MTGGoldfish and may change over time
