Taj-Nar Swordsmith is a uncommon Creature — Cat Soldier card from Commander 2017 (C17), collector number 77. Current market price: $0.34, TCGplayer market prices via Scryfall.
When this creature enters, you may pay {X}. If you do, search your library for an Equipment card with mana value X or less, put that card onto the battlefield, then shuffle.