mtg banned cards List Wizards Of The Coast Bans

The rare that gets pulled has a 50/50 chance of being either a holographic foil rare or a regular rare

Sunlit Marsh

Brawl Not Legal Vintage Banned Timeless Not Legal Commander Legal Pauper Banned Oathbreaker Not Legal Penny Not Legal "Name Sticker" Goblin This card does not meet Magic community standards

All of this is to say that Oko is extremely hard to answer in combat, so it largely requires a spell to deal with it (or, as we see in Throne of Eldraine Standard, you can go way over the top of its threat generation by, for example, making lots of 2/2s with Field of the Dead)

It's easy to cast Collector Ouphe as early as turn one to prevent any artifacts from being used practically the whole game