(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)
Underwater Tunnel
When you unlock this door, surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Slimy Aquarium
When you unlock this door, manifest dread, then put a +1/+1 counter on that creature.
NM-Mint - $0.10
Lightly Played - $0.10
Moderately Played - $0.10
Heavily Played - $0.10
Damaged - $0.10
NM-Mint Non English - $0.10
Lightly Played Non English - $0.10
Moderately Played Non English - $0.10
Heavily Played Non English - $0.10
Damaged Non English - $0.10
Foil Prices
NM-Mint Foil - $0.10
Lightly Played Foil - $0.10
Moderately Played Foil - $0.10
Heavily Played Foil - $0.10
Damaged Foil - $0.10
NM-Mint Foil Non English - $0.10
Lightly Played Foil Non English - $0.10
Moderately Played Foil Non English - $0.10
Heavily Played Foil Non English - $0.10
Damaged Foil Non English - $0.10