Wrexial, the Risen Deep

Islandwalk, swampwalk (This creature can’t be blocked as long as defending player controls an Island or a Swamp.)
Whenever Wrexial, the Risen Deep deals combat damage to a player, you may cast target instant or sorcery card from that player’s graveyard without paying its mana cost. If that spell would be put into a graveyard this turn, exile it instead.

Quag Vampires

Multikicker (You may pay an additional any number of times as you cast this spell.)
Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
Quag Vampires enters the battlefield with a +1/+1 counter on it for each time it was kicked.

Bog Tatters

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Bog Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Stalker Hag

Swampwalk, forestwalk (This creature can’t be blocked as long as defending player controls a Swamp or a Forest.)

Bog-Strider Ash

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
Whenever a player casts a Goblin spell, you may pay . If you do, you gain 2 life.

Bog Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Plague Beetle

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Bog Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Plague Beetle

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Street Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Mire Boa

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
: Regenerate Mire Boa.

Sol’kanar the Swamp King

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
Whenever a player casts a black spell, you gain 1 life.

Sewerdreg

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
Sacrifice Sewerdreg: Exile target card from a graveyard.

Bog Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Plague Beetle

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Anaconda

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Bog Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Plague Beetle

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Anurid Murkdiver

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)

Filth

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
As long as Filth is in your graveyard and you control a Swamp, creatures you control have swampwalk.

Slithery Stalker

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
When Slithery Stalker enters the battlefield, exile target green or white creature an opponent controls.
When Slithery Stalker leaves the battlefield, return the exiled card to the battlefield under its owner’s control.

Krosan Constrictor

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
: Target black creature gets -2/-0 until end of turn.

Whispering Shade

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)
: Whispering Shade gets +1/+1 until end of turn.

Bog Wraith

Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.)