Meria, Scholar of Antiquity Some may say Meria, Scholar of Antiquity is just Wish Urza, Lord High Artificer, but this commander can do some powerful stuff
But on closer inspection later I realized I was right the first time. According to Doug Beyer, a designer at Wizards , the only direction the team had for Sheppard was to remove Rubinias wings, which she had in the sketch
5 Tempt With Mayhem One for you, two for me
I have cut Jegantha as it doesn't add that much to the cube experience
It then adds powerful removal spells, mana acceleration/fixing (many of which have a sacrifice clause), and spells that generate treasure tokens (which can be very easily sacrificed to further power your sacrifice engine)
They're generally asking you to do something else, like cast a creature and get rewarded with a card for doing so