Evellia de Thaari

At the beginning of each opponent's upkeep, that player may have you create a Gold token. If they
don't, that player sacrifices a creature and loses 1
life. (A Gold token is an artifact with "Sacrifice this artifact: Add one mana of any color.")
Whenever you sacrifice a Gold, create a 1/1 white
and black Spirit creature token with flying.
"I've found that people, even willingly giving their
wealth, leave a part of themselves within it."