Sinister Hideout (#184)

Type: Land

Text: This land enters tapped.
{T}: Add {U} or {B}.
{4}, {T}: Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Under the sea it stands the hidden headquarters of the Master Planner and his band of strangely-garbed criminals.

Set: Marvel's Spider-Man (#184)