If my opponent uses the equip ability of a Lightening Greaves they control, and I target that ability with Reroute, whose creatures are legal targets for the equip ability?
The Equip keyword explicitly says "Attach this permanent to target [quality] creature you control.", so my question is basically, does "you" in that ability in this instance mean the controller of Lightning Greaves, the Controller of the Equip ability as its on the stack (which is still my opponent) or does it mean the chooser of the target (me)? My hunch is that "you" refers to the controller of the equip ability on the stack, and because I am only modifying that ability I have to choose one of my opponents creatures, but that's not especially clear to me
And yes I know that my opponent could just use the equip ability again, as they retain control of the equipment, so in this example its kind of a moot point. But there are other cases where it could be relevant, such as if the equipment in question was Colossus Hammer they might not have the mana to reuse the equip ability again during the same turn