The fact that this cant disrupt a Coven and requires (almost) Threshold to function proactively makes me feel like this is the kind of spell you want one copy of and no more
For example, if you have a novel take on giving a spell in your graveyard flashback, borrow Snapcaster Mages templating to make sure you dont make it overly complicated
Scrooge seems to have had it in his pile out in the Realm of Lorcana, it must have been taken to the Halls at one point as its in a glass sphere there
I'm especially glad to see sneak and extort show up as fun mechanics on Marvel Super Heroes cards
Buried in the Garden: Enchantress gets a new O-ring, except its also a Wild Growth
For example, if there are two +1/+1 counters on Aerith Gainsborough and it gets three -1/-1 counters, you'll put two +1/+1 counters on each legendary creature you control when Aerith Gainsborough's third ability resolves