If you control more creatures than each other player, put two of those cards into your hand
Theres already a lot that we know is going to be in the set (battles, the team-up legendary creatures, etc.), and I just dont think that the Eldrazi could mechanically fit into everything else going on without feeling like a disappointment
Starting with the airbend effect, which can temporarily tuck away creatures, Aang builds momentum quickly as your creatures leave the battlefield
Hiro Hamada, Robotics Prodigy is also a great card to have in your opening hand, as its tutoring ability will let you quickly set up future turns
Huatli, Poet of Unity / Roar of the Fifth People Huatli, Poet of Unity grabs you a basic land when it enters, so its a great ramp piece