The Strixhaven-Lorwyn Rover is a mythic Legendary Artifact Creature — Construct card from Unknown Event (UNK), collector number MA04. Current market price: $14.99, TCGplayer market prices via Scryfall.
Before the game beings, choose a Strixhaven college and a Lorwyn creature type (Elemental, Elf, Faerie, Giant, Goblin, Kithkin, Merfolk, or Treefolk.) This card has the color identity of the college chosen this way. Whenever you cast an instant or sorcery spell that's both the chosen college's colors or a creature spell of the chosen creature type, copy it. You may choose new targets for the copy.