Cheapest priced copy (Theros Beyond Death): $0.35 at Card Kingdom, near mint, their price list as of .
Skophos Maze-Warden 
Creature — Minotaur Warrior · 3/4 · Uncommon · Theros Beyond Death · #153
{1}: This creature gets +1/-1 until end of turn.
Whenever another creature becomes the target of an ability of a land you control named Labyrinth of Skophos, you may have this creature fight that creature. (Each deals damage equal to its power to the other.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death | 153 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 24 January 2020An ability that triggers when a creature becomes the target of an ability resolves before the ability that caused it to trigger. It resolves even if that ability is countered or if the creature is no longer a legal target.
- 24 January 2020If either Skophos Maze-Warden or the creature targeted by Labyrinth of Skophos has left the battlefield, the other won't deal or be dealt damage.