Sharyykannah, Moon Overlord

Double strike, flying, indestructible, lifelink
When Sharyykannah, Moon Overlord enters the battlefield, you gain 20 life.
Creatures you control have double strike and lifelink.
If Sharyykannah, Moon Overlord would be put into a graveyard from anywhere, shuffle all cards you own from exile and all cards in your graveyard into your library. Then, return Sharyykannah, Moon Overlord to your hand.