Plains

Carnivorous Plant

Disenchant

Mox Pearl

Wall of Swords

Defender (This creature can't attack.)
Flying

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Wall of Spears

Defender (This creature can't attack.)
First strike

Mox Emerald

Mishra's Factory

{T}: Add {C}.
{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Savannah

Giant Growth

Target creature gets +3/+3 until end of turn.

Forest

Prevent all combat damage that would be dealt this turn.

Chaos Orb

{1}, {T}: If Chaos Orb is on the battlefield, flip Chaos Orb onto the battlefield from a height of at least one foot. If Chaos Orb turns over completely at least once during the flip, destroy all nontoken permanents it touches. Then destroy Chaos Orb.

Primal Clay

As Primal Clay enters, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature gets +0/+2 and has reach. (It can block creatures with flying.)

Animate Wall

Enchant Wall
Enchanted Wall can attack as though it didn't have defender.

Righteousness

Target blocking creature gets +7/+7 until end of turn.

Black Lotus

{T}, Sacrifice Black Lotus: Add three mana of any one color.