Chandra's Dragonmech is a rare Artifact Creature — Dragon card from Unknown Event (UNK), collector number RA05d. Current market price: $45.00, TCGplayer market prices via Scryfall.
You can't include this card in your deck if you're on Team Speed Demons. Flying Whenever this creature deals combat damage to a player, create a copy of one of the following, chosen at random: Chandra's Fury, Chandra's Ignition, Chandra's Magmutt, Chandra's Regulator, Chandra's Spitfire, or Chandra's Outrage. You may cast the copy without paying its mana cost.