This is my rough draft for an experimental cube that utilizes obscure and underplayed mechanics. Some of the archetypes / mechanics that I plan to include are:

Suspend
Cascade
High cmc matters
Exile matters
Top of deck matters
Snow
Convoke
Tapped creatures matter
Charge counters
Sagas
Big instant/sorcery cheat
Cumulative upkeep
Legendary matters
Equipment
Domain

Also pending for viability:
Colorless matters
Keyword tribal
Vanishing
Vehicles