Dread Treads

These heavy boots or armored greaves are crafted from basilisk hide with soles of magnetized lodite. When you plant your feet, you become immovable by mundane means. You are immune to any effect that would push, pull, or slide you against your will. You also have advantage on checks and saves to resist being grappled, tripped, or knocked prone. As a swift action, you can release the anchoring effect to move normally.