time spiral card mtg Magic The Gathering - Clockspinning and put it into your hand Leyline of the Void (TSR-326)

In the context of The Brothers War, the new keyword is excellent at providing you a way to make use of Powerstones while not punishing you for leaving all your rocks in the car before battle, which means a wide variety of Commander decks will likely be seeking to include Prototype cards in their lists

Mostly Standard though maybe Pioneer as well where being non-legendary lets you run multiple copies, and yes, its abilities do stack

Consider if youre bringing them to a table in good faith in the first place

The foil version of Yarok is priced at around $33

There are also lots of things like Treachery and Cast Out that are great to kill which is not really the case for the artifacts