You can psych your opponents out with Evercoat Ursine too, exiling cards that aren't very good to bait out a removal spell
Anyway, onto the list
If they have eight or more cards in their graveyards, your Soaring Thought-Thief, Into the Story, or Lullmage's Domination go from good to great
Kamber, the Plunderer, gives you one life and generates Blood tokens whenever one of your opponents' creatures dies, giving you more instant draw options or letting you goad your opponents' creatures by sacrificing your Blood to his partner, Laurine, the Diversion
It will do so with less colours and coloured mana requirements and at instant speed
While cards from previous entries such as Inspired Sphinx , Rot Hulk , and Fiendish Duo have found a second home in Commander, Game Night: Free-for-All is the first time that these new cards have been legendary creatures