Sliver Overlord Sliver Overlord is a sliver that doesnt have keywords or abilities for all your other slivers, but what it does have is amazing for a Commander deck if you can keep this card alive
Having tournament staples costing hundreds of dollars is unacceptable
Then spend 1 mana to turn Volrath into Grim Poppet, removing the -1/-1 counters from Volrath and putting them on other creatures, letting you machine-gun down opposing creatures while generating mana
Shapeshifters like Vesuvan Drifter from MOM: The Aftermath are also good options, and Dimir colors are perfect for accessing lots of the best rogues in the game, like Frogtosser Banneret for cost reduction
When you gain life, you put that many +1/+1 counters on Bess, which can really amp her into a game winner
Think about it we are rarely going to suffer from not enough lands in the lands matter archetype