Serpent's Pass

Serpent's Pass is legal everywhere but earns consideration almost exclusively in Commander, where five-color fixing is a genuine need and the one-time tempo hit of entering tapped is easier to absorb over a longer game. In competitive formats like Modern or Legacy, tapped lands are a liability too steep to pay for fixing that offers no other upside — fetchlands and shocklands do the job faster and more reliably. In Pioneer and Standard, the same logic applies: Serpent's Pass competes against strictly better options at the same price point. Commander is where Serpent's Pass finds its audience, and even there it's a role-player rather than a staple.