Original Post — Direct link
about 2 years ago - /u/WotC_Jay - Direct link

Key Note: This is the one (and only) card from the Retro Artifacts that won't be legal in Historic.

There are some other potentially spicy cards that we'll be keeping an eye on, but, like with Strixhaven's Mystical Archive, we're starting off by only acting on cards we know will be a problem (like this one).