Stoneskin

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

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.

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.

Stalwart Shield-Bearers

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

Axebane Guardian

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

Rolling Stones

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

Rally of Wings

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

Forest

Solidarity

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

Ravnica at War

Bar the Door

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

Wall of One Thousand Cuts

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

Animate Wall

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

Swords to Plowshares

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

Wall of Swords

Defender (This creature can't attack.)
Flying

Cut a Deal

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