Unclaimed Tanadon is a common Artifact Creature — Beast card from Unknown Event (UNK), collector number CG07.
If you're on the Mirran team, this card costs {1} less to cast. If you're on the Phyrexian team, the colored mana symbols in Unclaimed Tanadon's mana cost are Phyrexian mana. (You can pay them either with {G} or 2 life.)