Rathian, Queen of the Land

Partner with Rathalos, King of the Skies. (When
this creature enters the battlefield, target player may
put Rathalos into their hand from their library, then
shuffle.)
Flying, deathtouch
Whenever Rathian attacks you may have it lose
flying until end of turn. If you do, target creature
blocks Rathian this turn if able.
If Rathian would die, you may shuffle it into
your library instead.