Pestilence Rats

Pestilence Rats’s power is equal to the number of other Rats on the battlefield. (For example, as long as there are two other Rats on the battlefield, Pestilence Rats’s power and toughness are 2/3.)

Stampede

Attacking creatures get +1/+0 and gain trample until end of turn.

Snow Fortress

Defender (This creature can’t attack.)
: Snow Fortress gets +1/+0 until end of turn.
: Snow Fortress gets +0/+1 until end of turn.
: Snow Fortress deals 1 damage to target creature without flying that’s attacking you.

Goblin Sappers

, : Target creature you control can’t be blocked this turn. Destroy it and Goblin Sappers at end of combat.
, : Target creature you control can’t be blocked this turn. Destroy it at end of combat.

Stone Spirit

Stone Spirit can’t be blocked by creatures with flying.

Ice Floe

You may choose not to untap Ice Floe during your untap step.
: Tap target creature without flying that’s attacking you. It doesn’t untap during its controller’s untap step for as long as Ice Floe remains tapped.

Aspect of Wolf

Enchant creature
Enchanted creature gets +X/+Y, where X is half the number of Forests you control, rounded down, and Y is half the number of Forests you control, rounded up.

Sea Serpent

Sea Serpent can’t attack unless defending player controls an Island.
When you control no Islands, sacrifice Sea Serpent.

Raise Dead

Return target creature card from your graveyard to your hand.

Scavenging Ghoul

At the beginning of each end step, put a corpse counter on Scavenging Ghoul for each creature that died this turn.
Remove a corpse counter from Scavenging Ghoul: Regenerate Scavenging Ghoul.

Zombie Master

Other Zombie creatures have swampwalk. (They can’t be blocked as long as defending player controls a Swamp.)
Other Zombies have “: Regenerate this permanent.”

Bog Wraith

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

Sea Serpent

Sea Serpent can’t attack unless defending player controls an Island.
When you control no Islands, sacrifice Sea Serpent.

Bog Wraith

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

Black Knight

First strike (This creature deals combat damage before creatures without first strike.)
Protection from white (This creature can’t be blocked, targeted, dealt damage, or enchanted by anything white.)

Zombie Master

Other Zombie creatures have swampwalk. (They can’t be blocked as long as defending player controls a Swamp.)
Other Zombies have “: Regenerate this permanent.”

Raise Dead

Return target creature card from your graveyard to your hand.

Aspect of Wolf

Enchant creature
Enchanted creature gets +X/+Y, where X is half the number of Forests you control, rounded down, and Y is half the number of Forests you control, rounded up.

Battering Ram

At the beginning of combat on your turn, Battering Ram gains banding until end of combat. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are being blocked by a creature, you divide that creature’s combat damage, not its controller, among any of the creatures it’s blocking.)
Whenever Battering Ram becomes blocked by a Wall, destroy that Wall at end of combat.