Assault Formation

Each creature you control assigns combat damage equal to its toughness rather than its power.
{G}: Target creature with defender can attack this turn as though it didn't have defender.
{2}{G}: Creatures you control get +0/+1 until end of turn.

Stalwart Shield-Bearers

Defender
Other creatures you control with defender get +0/+2.

Flight Spellbomb

{T}, Sacrifice Flight Spellbomb: Target creature gains flying until end of turn.
When Flight Spellbomb is put into a graveyard from the battlefield, you may pay {U}. If you do, draw a card.

Overgrown Battlement

Defender
{T}: Add {G} for each creature you control with defender.

Solidarity

Creatures you control get +0/+5 until end of turn.

Swords to Plowshares

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

Tower Defense

Creatures you control get +0/+5 and gain reach until end of turn.

Animate Wall

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

Bar the Door

Creatures you control get +0/+4 until end of turn.

Rolling Stones

Wall creatures can attack as though they didn't have defender.

Ravnica at War

Forest

Axebane Guardian

Defender
{T}: Add X mana in any combination of colors, where X is the number of creatures you control with defender.

Stoneskin

Flash
Enchant creature
Enchanted creature gets +0/+10.

Plains

Cut a Deal

Each opponent draws a card, then you draw a card for each opponent who drew a card this way.

Rally of Wings

Untap all creatures you control. Creatures you control with flying get +2/+2 until end of turn.

Wall of Swords

Defender (This creature can't attack.)
Flying

Wall of One Thousand Cuts

Defender, flying
{W}: Wall of One Thousand Cuts can attack this turn as though it didn't have defender.