Foreboding Ruins

As Foreboding Ruins enters the battlefield, you may reveal a Swamp or Mountain card from your hand. If you don’t, Foreboding Ruins enters the battlefield tapped.
: Add or .

Karakas

: Add .
: Return target legendary creature to its owner’s hand.

Ensnaring Bridge

Creatures with power greater than the number of cards in your hand can’t attack.