Cheapest priced copy (Theros Beyond Death): $0.35 at Card Kingdom, near mint, their price list as of .
Warden of the Chained 
Creature — Minotaur Warrior · 4/4 · Uncommon · Theros Beyond Death · #230
Trample
This creature can't attack unless you control another creature with power 4 or greater.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death | 230 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 24 January 2020If you control two Wardens of the Chained, each will fulfill the other's condition and both will be able to attack.
- 24 January 2020Once Warden of the Chained is attacking, it will remain attacking even if you no longer control another creature with power 4 or greater.