Diana, Angel of Legends

Indestructible, flying, protection from black,
blue and multicoloured
whenever a land enters the battlefield, you may
search for a permanent card with converted mana
cost 4 or greater, reveal it, put it into your hand,
then shuffle your library
"All would-be legends are subject to my harshest judgement, but also to my highest respect, so even the rejected and oppressed may have their chance at
greatness with my hand to guide them forth."