Cheapest priced copy (Battle for Zendikar): $1.99 at Card Kingdom, near mint, their price list as of .
From Beyond 
Enchantment · Rare · Battle for Zendikar · #167
Devoid (This card has no color.)
At the beginning of your upkeep, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add {C}."
{1}{G}, Sacrifice this enchantment: Search your library for an Eldrazi card, reveal it, put it into your hand, then shuffle.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $1.99 to $13.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 167 | Rare | $1.99 | $4.49 |
| Battle for Zendikar Promos | 167s | Rare | — | $13.99 |
10 rulings from Wizards of the Coast
- 25 August 2015A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
- 25 August 2015Sacrificing an Eldrazi Scion creature token to add {C} is a mana ability. It doesn't use the stack and can't be responded to.
- 25 August 2015If a card loses devoid, it will still be colorless. This is because effects that change an object's color (like the one created by devoid) are considered before the object loses devoid.
- 25 August 2015An Eldrazi card is one with the creature type Eldrazi. Just having "Eldrazi" in its name or being an Eldrazi-themed card doesn't count.
- 25 August 2015Some instants and sorceries that create Eldrazi Scions require targets. If all targets for such a spell have become illegal by the time that spell tries to resolve, the spell won't resolve and none of its effects will happen. You won't get any Eldrazi Scions.
- 25 August 2015Eldrazi Scions are similar to Eldrazi Spawn, seen in the Zendikar block. Note that Eldrazi Scions are 1/1, not 0/1.
- 25 August 2015Cards with devoid use frames that are variations of the transparent frame traditionally used for Eldrazi. The top part of the card features some color over a background based on the texture of the hedrons that once imprisoned the Eldrazi. This coloration is intended to aid deckbuilding and game play.
- 25 August 2015Other cards and abilities can give a card with devoid color. If that happens, it's just the new color, not that color and colorless.
- 25 August 2015Devoid works in all zones, not just on the battlefield.
- 25 August 2015Eldrazi and Scion are each separate creature types. Anything that affects Eldrazi will affect these tokens, for example.