Cheapest priced copy (Midnight Hunt Commander): $0.79 at Card Kingdom, near mint, their price list as of .
Ghouls' Night Out 
Sorcery · Rare · Midnight Hunt Commander · #57
For each player, choose a creature card in that player's graveyard. Put those cards onto the battlefield under your control. They're black Zombies in addition to their other colors and types and they gain decayed. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.79 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Midnight Hunt Commander | 19 | Rare | $0.79 | — |
| Midnight Hunt Commander | 57 | Rare | $0.99 | — |
6 rulings from Wizards of the Coast
- 24 September 2021If any creature cards put onto the battlefield this way become permanents that aren't creatures because of another effect, those permanents won't be Zombies, but they will gain decayed.
- 24 September 2021 Decayed does not create any attacking requirements. You may choose not to attack with a creature that has decayed.
- 24 September 2021 Decayed does not grant haste. Creatures with decayed that enter the battlefield during your turn may not attack until your next turn.
- 24 September 2021 Decayed represents a static ability and a triggered ability. "Decayed" means "This creature can't block" and "When this creature attacks, sacrifice it at end of combat."
- 24 September 2021The creatures will enter the battlefield simultaneously. They will see each other enter for the purposes of triggered abilities.
- 24 September 2021 Once a creature with decayed attacks, it will be sacrificed at end of combat, even if it no longer has decayed at that time.