Boots of the Iron Footed (5e Equipment)
From D&D Wiki
Wondrous item, legendary (requires attunement)
these boots feel heavy when you pick them up easily weighting a ton, however when you don these boots and attune to them they feel weightless, they look like simple boots however on closer inspection runes can be seen faintly engraved along the bottom of the boots otherwise they look like completely normal black boots.
Heavy. While wearing these boots, you have advantage on checks to resist being pushed or moved from your current position.
Iron Footed. While wearing these boots, your unarmed strikes that kick a creature deal 1d8 additional bludgeoning damage.
Iron Sole. You gain resistance to piercing damage.