Sinkhole

Winter's Grasp

Wild Mongrel

Discard a card: This creature gets +1/+1 and becomes the color of your choice until end of turn.

Myr Landshaper

{T}: Target land becomes an artifact in addition to its other types until end of turn.

Tranquil Thicket

This land enters tapped.
{T}: Add {G}.
Cycling {G} ({G}, Discard this card: Draw a card.)

Strip Mine

{T}: Add {C}.
{T}, Sacrifice this land: Destroy target land.

Tinder Wall

Defender (This creature can't attack.)
Sacrifice this creature: Add {R}{R}.
{R}, Sacrifice this creature: It deals 2 damage to target creature it's blocking.

Forest

Splinter

Exile target artifact. Search its controller's graveyard, hand, and library for all cards with the same name as that artifact and exile them. Then that player shuffles.

Mana Leech

You may choose not to untap this creature during your untap step.
{T}: Tap target land. It doesn't untap during its controller's untap step for as long as this creature remains tapped.

Ankh of Mishra

Whenever a land enters, this artifact deals 2 damage to that land's controller.

Sol Ring

Eradicate

Exile target nonblack creature. Search its controller's graveyard, hand, and library for all cards with the same name as that creature and exile them. Then that player shuffles.

Terravore

Trample
Terravore's power and toughness are each equal to the number of land cards in all graveyards.

Mole Worms

Animate Land

Until end of turn, target land becomes a 3/3 creature that's still a land.

Swamp

Barren Moor

This land enters tapped.
{T}: Add {B}.
Cycling {B} ({B}, Discard this card: Draw a card.)