Cheapest priced copy (Battle for Zendikar): $0.35 at Card Kingdom, near mint, their price list as of .
Adverse Conditions 
Instant · Uncommon · Battle for Zendikar · #54
Devoid (This card has no color.)
Tap up to two target creatures. Those creatures don't untap during their controller's next untap step. Create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add {C}."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 54 | Uncommon | $0.35 | $0.49 |
11 rulings from Wizards of the Coast
- 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 2015A card with devoid is just colorless. It's not colorless and the colors of mana in its mana cost.
- 25 August 2015Adverse Conditions tracks the creatures, but not their controller. If either of the creatures changes controllers before its first controller's next untap step has come around, then it won't untap during its new controller's next untap step.
- 25 August 2015You can cast Adverse Conditions with no targets. When it resolves, you'll get an Eldrazi Scion. However, if you cast Adverse Conditions with any targets and all of those targets are illegal as it tries to resolve, it won't resolve and none of its effects will happen. You won't get the Eldrazi Scion in that case.
- 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 2015Eldrazi and Scion are each separate creature types. Anything that affects Eldrazi will affect these tokens, for example.
- 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 2015Devoid works in all zones, not just on the battlefield.
- 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 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 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.