The first is self-explanatory, all minions in play get +1/+1, but the second can be explosive
As for Bust, once you hit six mana to cast - something not hard to reach in Commander at all - you can get rid of all the lands, regardless of their type
In our example Play Booster, two of the best threats are Relentless X-ATM092 and Gix, Yawgmoth Praetor as "The Shadow Lord." Relentless X-ATM092 is a high-power creature that forces your opponent to block or take damage, while "The Shadow Lord" draws cards over the course of the game
Shroofus Sproutsire -- This card can generate amusing numbers of Saprolings, though Tana, the Bloodsower offers more in this role
For my money, Id use it on something like Summon: Good King Mog XII , Hildibrand Manderville , or Ardbert, Warrior of Darkness