Terrarion is a common Artifact card from Ravnica: City of Guilds (RAV), collector number 273. Current market price: $0.11 (foil $2.00), TCGplayer market prices via Scryfall.
This artifact enters tapped. {2}, {T}, Sacrifice this artifact: Add two mana in any combination of colors. When this artifact is put into a graveyard from the battlefield, draw a card.