Red decks need their removal to be able to go directly to the face, which is the one thing you cannot Terminate, and while being cheap is nice, the creatures you need Terminate for don't come out fast enough to reward you much for it being so cheap
Atraxa, Grand Unifier Atraxa, Grand Unifier has great keywords, the number of colors to be a useful 4-color commander, and a fantastic way to get some cards from the top of your deck
Aether Poisoner has Deathtouch and "When Aether Poisoner enters the battlefield, you get two energy counters"
Voidwing Hybrid BPhillipYork: So, pretty strong with Yawgmoth, Thran Physician and just generally kind of useful for discard effects, if you're also proliferating
This is speculation, of course