"Maybe" he says "And I'm not trying to discourage you. In away you have more experience with this than you know. The healing cookies at Rivervale, for example. Those last longer partly because it's IN the hold, but also because of the skill of the cooks AND, not least, the fact the cookie sheets and pans are not ordinary but themselves custom crafted. They still lose effectiveness after a few days which is why they get made often, but each batch is a bit different. Glamour hates going stale through too much same same but hypocritically, it also loves building on traditions and tried and true symbols. Now Fairy Ring is a powerful cantrip, for that, you'd want to make something with at least four components to the making. For example... let's say you used that knife to cut out a pattern on leather. That's one. The leather itself was cut from the hide of a DeBuke cow who died at age 21, VERY old for a cow, and 3 times 7 includes both magical and lucky numbers.. that would be two components. You decide to tan the leather on a holiday, that's three components... then finally, you notch in Titania's name and house symbol on it. In the end it becomes a leather patch that looks like a dream catcher but provides protection in your fairy ring idea."