You can control the number of creatures in order's graveyards to ensure that your disposable army gets smashed, so exile stuff from graveyards with things like Bojuka Bog
You should already be looking for the walking moxes that are green's mana creatures, so supplement them with artifact mana and a range of efficient, beefy green creatures at all points on the mana curve
Buffing all your Equipped creatures is going to come up, especially in RW and just being able to move this Equipment around to whatever creature benefits most from it is pretty great
Tidus, Yuna's Guardian I get a little bummed that Tidus, Yuna's Guardian is stuck working with only creatures, but the ability to move counters and proliferate is very good
That said, the Bonus Cards for the MTG X PlayStation Secret Lair remained a mystery, and are only starting to be revealed