MTG Salvation

These feel to me like factions for a set in which there’s five colorless “hued” or “tainted” factions, rather than altogether new colors.

CW
CU
CB
CR
CG

Nothing to do with the Eldrazi mind you. Lands to support limited.

Crystal Field (Common)
Land
t: Add C or W.

...cycled out and filling the land spot in each booster.

Spires of Nashtath (Uncommon)
Land
Spires of Nashtath enters the battlefield tapped.
t: Add C, W, or U.

...cycled out

Megalith (Uncommon)
4
When Megalith enters the battlefield, choose two types of mana.
t: Add the chosen types of mana.