I would definitely recommend Burgeoning, as in play-groups of 4 or more this grants you much more of an advantage than Exploration does, though it wouldn't hurt to have both in here either
5 Rith, The Awakener The first thing that comes to mind when you think Saproling likely isnt a huge, fire-breathing dragon, but nevertheless Rith makes for an excellent Saproling tribal commander
I got enough "Hokey Pokey" questions when Unglued came out that I've learned to never assume anything
Loxi: This card is absolutely a bomb and is the Commander I'm most excited for from the set
Khrn the Betrayer If youve ever wondered what a mono-red group hug card would look like, look no further than Khrn the Betrayer
Legendary Creature - Human Noble Commander (CTRL to add secondary) Artifact Andril, Flame of the West Equipped creature gets +3/+1