At 18/6, you only need to hit twice with this to take someone out through Commander damage
Number 1 Language English Not Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pauper, Pioneer, Standard, Timeless, Vintage Rulings (10/7/2022) At the time of Unfinity's release, the following card sets are permitted in the Standard format: Innistrad: Midnight Hunt, Innistrad: Crimson Vow, Kamigawa: Neon Dynasty, Streets of New Capenna, and Dominaria United
However the extra flexibility of being an instant that also doubles as removal or a counter gives it many more useful applications in decks that can run it
Fischer Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
My Verdict: Swiftfoot Boots offers powerful, flexible protection at a higher equip cost