Cheapest priced copy (Murders at Karlov Manor Commander): $0.79 at Card Kingdom, near mint, their price list as of .
Immortal Obligation 
Instant · Rare · Murders at Karlov Manor Commander · #321
Return target creature card from an opponent's graveyard to the battlefield under their control with a duty counter on it. For as long as that creature has a duty counter on it, it is goaded, can't attack you or a permanent you control, and can't block creatures you control.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.79 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Murders at Karlov Manor Commander | 10 | Rare | $0.79 | — |
| Murders at Karlov Manor Commander | 321 | Rare | $1.49 | — |