Cheapest priced copy (Shadows over Innistrad): $0.35 at Card Kingdom, near mint, their price list as of .
Emissary of the Sleepless 
Creature — Spirit · 2/4 · Common · Shadows over Innistrad · #17
Flying
When this creature enters, if a creature died this turn, create a 1/1 white Spirit creature token with flying.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shadows over Innistrad | 17 | Common | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 8 April 2016Emissary of the Sleepless’s last ability doesn’t create additional Spirit tokens if more than one creature died this turn.
- 8 April 2016Token creatures that are destroyed or put into a graveyard from the battlefield for other reasons do die—they go to their owner’s graveyard before ceasing to exist.
- 8 April 2016Emissary of the Sleepless’s last ability checks only if a creature died earlier in the turn. The creature card doesn’t need to still be in the graveyard.