Inspired by Shi.ar's one drop cube http://www.cubetutor.com/cubeblog/456 Which was, itself, inspired by @secludedglen
http://www.starcitygames.com/article/29246_One-Drops-In-Three-Dimensions.htmlexpanded options:
https://cubecobra.com/cube/overview/ondeck [https://cubecobra.com/cube/overview/ondeck]

Supported Archetypes:
Anecdotally, aggro and midrange with a soft control seem most frequent. I don't believe I support any true game ending combos.

Mono-White: tempo and equipment matters/voltron
Mono-blue: not supported (expectation is blue will be a splash color)
Mono-black: aggro/tempo and death's shadow (life as a resource)
Mono-green: midrange/go-wide tokens/grow style creatures
Mono-Red: spells matter/prowess and burn

Most decks will be two or three colors, with 12-14 lands. Two color archetypes are amorphous, but expect to use one or both colors' threats with removal spells primarily from one color.