Worldknit

Standard	Not Legal
Pioneer	Not Legal
Modern	Not Legal
Legacy	Banned since June 6, 2014
Vintage	Banned since June 6, 2014
Commander	Banned since June 6, 2014
Pauper	Never Banned
Oathbreaker	Banned since June 19, 2018
Extended	Not Legal

View on Scryfall

Timeline

• June 6, 2014 - Released
• June 6, 2014 - Status changed to Banned in Vintage
• June 6, 2014 - Status changed to Banned in Legacy
• June 6, 2014 - Status changed to Banned in Commander
• June 19, 2018 - Status changed to Banned in Oathbreaker

Rationale

Worldknit is a Conspiracy card, which was designed exclusively for the draft format. As a result, all Conspiracy cards were pre-emptively banned in all constructed formats upon release.