With a bigger focus on having lands on the battlefield in new Standard, I foresee Nissa, Vastwood Seer to be easier to flip than ever
If the chaotic energy of Rakdos is your speed in Commander, you can pick from these amazing commanders or from three new additions to the crew with The Infamous Cruelclaw, Valgavoth, Harrower of Souls, and Laughing Jasper Flint
As I have moved away from combo and as decks have become more robust and redundant the danger of self mill in cube has fallen to nearly as little risk as in constructed
All you need is a card like Heartstone or Zirda, the Dawnwaker to reduce the cost of Sliver Queens effect, then cards like Earthcraft or Gemhide Sliver + a haste enabler, and you have access to infinite 1/1s
Urza, Lord High Artificer is that kind of card from Modern Horizons
The possessed person would then become cannibalistic and violent