(: Add or to your mana pool.)
Tidal Stronghold enters the battlefield tapped.
: Tidal Stronghold becomes a 2/2 black Specter creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Tidal Stronghold becomes a 2/2 black Specter creature until end of turn. It's still a land.
