Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Carrier Thrall 
Creature — Vampire · 2/1 · Uncommon · Battle for Zendikar · #106
When this creature dies, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this token: Add {C}."
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
5 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 72 | Common | $0.35 | $0.49 |
| Battle for Zendikar | 106 | Uncommon | $0.35 | $0.79 |
| Commander Masters | 142 | Common | $0.35 | $0.49 |
| Duel Decks: Nissa vs. Ob Nixilis | 42 | Uncommon | $0.35 | — |
| The List | 2X2-72 | Common | $0.35 | — |
4 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 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 2015Eldrazi and Scion are each separate creature types. Anything that affects Eldrazi will affect these tokens, for example.