Conjurer's Mantle is a rare Artifact — Equipment card from March of the Machine Commander (MOC), collector number 12. Current market price: $2.27, TCGplayer market prices via Scryfall.
Equipped creature gets +1/+1 and has vigilance. Whenever equipped creature attacks, look at the top six cards of your library. You may reveal a card that shares a creature type with that creature from among them and put it into your hand. Put the rest on the bottom of your library in a random order. Equip {1}