Cheapest priced copy (Innistrad: Midnight Hunt): $1.79 at Card Kingdom, near mint, out of stock, their price list as of .
Tainted Adversary 
Creature — Zombie · 2/3 · Mythic · Innistrad: Double Feature · #124
Deathtouch
When this creature enters, you may pay {2}{B} any number of times. When you pay this cost one or more times, put that many +1/+1 counters on this creature, then create twice that many 2/2 black Zombie creature tokens with decayed. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $1.79 to $22.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 124 | Mythic | $2.49 | $22.99 |
| Innistrad: Midnight Hunt | 124 | Mythic | $1.79Out of stock | $2.49 |
| Innistrad: Midnight Hunt | 350 | Mythic | $2.99 | $3.49 |
| Innistrad: Midnight Hunt Promos | 124p | Mythic | $2.79Out of stock | $3.49 |
| Innistrad: Midnight Hunt Promos | 124s | Mythic | — | $3.99 |
5 rulings from Wizards of the Coast
- 24 September 2021Decayed does not grant haste. Creatures with decayed that enter the battlefield during your turn may not attack until your next turn.
- 24 September 2021Once a creature with decayed attacks, it will be sacrificed at end of combat, even if it no longer has decayed at that time.
- 24 September 2021Decayed does not create any attacking requirements. You may choose not to attack with a creature that has decayed.
- 24 September 2021Decayed 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 2021After you pay the {2}{B} cost one or more times, a second ability triggers. Players may respond to the new ability at that point. As that ability resolves, Tainted Adversary gets its counters and the tokens are created.