Talrand, Sky Summoner and Murmuring Mystic generate extra flying bodies in case your commander falls and you need cheap backup to get a board again
You don't want to have too many, but holding onto ways to break up an opponent's plan is helpful
x1] [Activate: Main] [Once Per Turn] Draw 1 card and place 1 card from your hand at the top or bottom of your deck
Its a useful common since it counts as an enchantment for decks that care and is great sacrifice fodder for others
Turn Volrath into the joiner, tap for 7 green mana, spend 1 mana to turn Volrath into Pili, then spend another 2 mana to untap Volrath and generate 1 mana of any color, generating infinite colored mana
When you were casting this guy on turn three in Modern, after a Thought-Knot Seer on turn two, it was no wonder the Oath of the Gatewatch Pro Tour Top 8 had six Eldrazi decks in it