Koresko Format, or Pauper Quindecim, is a format drummed up by the Deal Me In Games community. It’s a mix of EDH/Commander and Pauper. Pauper Quindecim requires a 60-card deck and 15-card sideboard where each card is unique. In taking from Pauper, all cards in the deck must have been printed as a common or an uncommon at some point, and must have a printing that is listed at $15 or under, based on the metric of the TCGplayer market price.
Current banned list:
SKULLCLAMP (any printing)