While other cards over the years have featured effects similar to this (mythic rare Zur, Eternal Schemer from Dominaria United comes to mind), Opalescence was the first to do it en masse for enchantments, and, due to its novelty and being first on the scene, it clocks in with a price point approaching $30
It's all about the ninja moves that these characters have, along with their inner turmoil." Looking further ahead, this new Teenage Mutant Ninja Turtles mechanic may also be a way to apply a Ninjutsu-style ability to creatures that aren't ninjas
Expert-Level Sets Expert-level was the height of the rating system and were the most complex mechanics and thematic cards available
Given that it's a rare, that's going to make Erode pretty pricey if we don't get a reprint
These will also be made available digitally on Magic: The Gathering Arena