Zerthimon, of the Only Sky

Defender, Flying, Vigilance
As long as you control 5 or more monks, creatures
you control have ward {2} and can attack as though
it dind't have defender.
When a creature or enchantment enters the
battlefield, you may pay {1} and return a creature
you control to your hand. If you do, create a copy
of that creature in your hand except it is a monk
2/2 and has defender.