Avacyn's Memorial

Indestructible
Other legendary permanents you control have indestructible.

Wall of Air

Defender, flying (This creature can't attack, and it can block creatures with flying.)

The Walls of Ba Sing Se

Defender
Other permanents you control have indestructible.

Wall of Blossoms

Defender
When this creature enters, draw a card.

Arcades, the Strategist

Flying, vigilance
Whenever a creature you control with defender enters, draw a card.
Each creature you control with defender assigns combat damage equal to its toughness rather than its power and can attack as though it didn't have defender.