A "Kitchen sink type cube" meant to cull leftover draft cards. Aside from recycling crappy cardboard, it also hopefully has some synergy

Singleton makes archetype enablers harder to find. Add more of those. Each color pair should also get a second signpost for fairness. Also we might try giving each color pair a split card, shouldn't mess up the balance to much i think.
The cube also needs more creatures, there is a considerable card type unbalance
WR Artifacts (MH2, NEW, NEO etc)

W - Counters (9) A control piece, more artifact
U - Card draw (20)
B - Graveyard (20) More aggressive creatures, more reanimator
R - Noncreature (17) More delerium, more artifact, more big
G - Ferocious
CL (4) Scarecrow?

UR - Delerium
WG - Go big
BU - Mill
UG - Card draw
WR - Artifacts
RB - Reanimator
WB - Aggro
WU - Control
RG - Enchantment
BG - Lands in graveyard

On a plane where intelligent animals rule and humans are scarce, summoners from across the realm converge to claim the title of archmage