Craft with two that share a card type 6 (6, Exile this artifact, Exile the two from among other permanents you control and/or cards from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)
Reverse Type:
Artifact
Apex Observatory enters the battlefield tapped. As it enters, choose a card type shared among two exiled cards used to craft it.
T: The next spell you cast this turn of the chosen type can be cast without paying its mana cost.
Though they had never left the Core, the Oltec knew the stars.
Near Mint - $700
Lightly Played - $600
Moderately Played - $500
Heavily Played - $500
Damaged - $400
Near Mint Spanish - $700
Lightly Played Spanish - $600
Moderately Played Spanish - $500
Heavily Played Spanish - $500
Damaged Spanish - $400
Foil Prices
Near Mint Foil - $1.500
Lightly Played Foil - $1.200
Moderately Played Foil - $1.000
Heavily Played Foil - $900
Damaged Foil - $800
Near Mint Foil Spanish - $1.500
Lightly Played Foil Spanish - $1.200
Moderately Played Foil Spanish - $1.000
Heavily Played Foil Spanish - $900
Damaged Foil Spanish - $800