Alabaster Wall

Defender (This creature can't attack.)
{T}: Prevent the next 1 damage that would be dealt to any target this turn.

Wall of Earth

Shifting Wall

Defender (This creature can't attack.)
This creature enters with X +1/+1 counters on it.

Wall of Hope

Defender (This creature can't attack.)
Whenever this creature is dealt damage, you gain that much life.

Angelic Wall

Defender (This creature can't attack.)
Flying

Crenellated Wall

Defender (This creature can't attack.)
{T}: Target creature gets +0/+4 until end of turn.

Wall of Junk

Defender (This creature can't attack.)
When this creature blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)

Steel Wall

Excavated Wall

Defender
{1}, {T}: Mill a card. (Put the top card of your library into your graveyard.)

Animate Wall

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

Aetherflame Wall

Defender
This creature can block creatures with shadow as though they didn't have shadow.
{R}: This creature gets +1/+0 until end of turn.

Amaranthine Wall

Defender
{2}: This creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Walking Wall

Defender
{3}: This creature gets +3/-1 until end of turn and can attack this turn as though it didn't have defender. Activate only once each turn.

Wall of Diffusion

Defender (This creature can't attack.)
This creature can block creatures with shadow as though it had shadow.

Arabella, Abandoned Doll

Whenever Arabella attacks, it deals X damage to each opponent and you gain X life, where X is the number of creatures you control with power 2 or less.

Living Wall

Defender (This creature can't attack.)
{1}: Regenerate Living Wall.

Pitchstone Wall

Defender (This creature can't attack.)
Whenever you discard a card, you may sacrifice this creature. If you do, return the discarded card from your graveyard to your hand.