Pauper Synergy Cube. The cube focuses on highly synergistic combinations to provide a skill intensive draft and play environment.
Themes:
UW: blink
UR: Spells Matter
WB: life drain
WR: go wide
WG: convoke/insire
UB: delve
UG: counters
RB: aristocrat
RG: monsters
BG: graveyard matters