What cards care about rule 707.2c?

Doing a deep dive to make sure I really understand the rules and interactions related to copy effects for a commander deck I'm building; [[Muddle, the Ever-Changing]]

I came across rule 707.2c which reads: "If a static ability generates a continuous effect that’s a copy effect, the copiable values that effect grants are determined only at the time that effect first starts to apply"

I couldn't think of a single card that does this, even tried searching scryfall with a regex term that (tries) to filter for static abilities that would either create, or make something a copy but I couldn't find anything.

Do any cards exist that care about this rule? if so, which cards? Bonus points if you can think of any interesting interactions with them you can think of!