In today's Banned and Restricted Announcement, Wizards of the Coast announced a change for Modern. Krark-Clan Ironworks is now banned. R&D member Ian Duke explained "while the primary reasons for banning a card from the Ironworks deck are its raw win rate and high GP Top 8 conversion rate, we also considered its highly polarized Game 1 (pre-sideboard) win rate, sometimes long turn length, and difficult rules interactions as secondary factors." You can find the entire announcement here.
