Cheapest priced copy (Commander 2017): $11.99 at Card Kingdom, near mint, their price list as of .
Boneyard Scourge 
Creature — Zombie Dragon · 4/3 · Rare · Commander 2017 · #15
Flying
Whenever a Dragon you control dies while this card is in your graveyard, you may pay {1}{B}. If you do, return this card from your graveyard to the battlefield.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $11.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2017 | 15 | Rare | $11.99 | — |
2 rulings from Wizards of the Coast
- 25 August 2017If Boneyard Scourge leaves your graveyard before its triggered ability resolves, it won't be returned to the battlefield.
- 25 August 2017If Boneyard Scourge dies at the same time as another Dragon you control, its ability won't trigger.