Rhonas the Indomitable
Amonkhet — mythic
Legendary Creature — God
Rhonas the Indomitable rulings:
2017-04-18: Once Rhonas has attacked or blocked, it will remain in combat even if you no longer control another creature with power 4 or greater.
2017-04-18: You don’t have to attack with another creature with power 4 or greater for Rhonas to be able to attack. The same is true of blocking.