The Serpent's Den

Hideaway (This land enters the battlefield tapped.
When it does, look at the top four cards of your library, exile one face down, then put the rest on
the bottom of your library.)
{t}: {u/b}
{u/b},{t}: Put the exiled card into your hand.
Activate this ability only if you control at least 1
rogue and at least 1 wizard or assassin.