Cheapest priced copy (Theros Beyond Death): $0.35 at Card Kingdom, near mint, their price list as of .
Flummoxed Cyclops 
Creature — Cyclops · 4/4 · Common · Theros Beyond Death · #135
Reach
Whenever two or more creatures your opponents control attack, this creature can't block this combat.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death | 135 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 24 January 2020Once two or more creatures your opponents control have attacked, Flummoxed Cyclops won’t be able to block, even if all but one of those attackers leave the battlefield before its triggered ability resolves.
- 24 January 2020In a game using the shared team turns option (a Two-Headed Giant game, for example), Flummoxed Cyclops’s ability triggers if two or more players each attack with only one creature.