Avacyn, Angel of Hope

Flying, vigilance, indestructible
Other permanents you control have indestructible.

Wall of Omens

Defender
When Wall of Omens enters, draw a card.

Boreas Charger

Flying
When Boreas Charger leaves the battlefield, choose an opponent who controls more lands than you. Search your library for a number of Plains cards equal to the difference, reveal those cards, put one of them onto the battlefield tapped and the rest into your hand, then shuffle.