mtg commander masters commander deck Magic the Gathering: 1 Life Wheel Commander Masters Preorder | Magic:

That said, there are a couple of places where Days Undoing might find a home

Kaldheim (KHM) 425 cards Released 2021-02-05 $969.16 700.45 10.98 TIX In Boosters 288 cards Borderless Planeswalkers 4 cards Alternate-Art Borderless Cards 9 cards Showcases 35 cards Extended Art 40 cards Theme Booster Cards 20 cards Bundle Lands 5 cards Promos 7 cards Set Extensions 2 cards Alchemy 15 cards It is the moment of discovery, the triumph of the mind, and the end of these results

It also has the potential to serve as creature removal without killing your own Monastery Swiftspear

There are a lot of enter the battlefield triggers that pair nicely with Yarok