Rogue's Passage

Colorless mana and a four-mana activation are far too slow for most Modern decks; it lacks a credible current competitive home.

Could be wrong if A heavy-mana creature deck could want a singleton land to force through a large non-trampling threat.

Legacy's efficient mana, Wasteland pressure, and cheap interaction leave little room for a colorless land with a four-mana combat effect.

Could be wrong if A specialized land-based or oversized-creature strategy could use it as a tutorable one-of.

Voltron decks can use a land-slot repeatable way to force commander damage, but colorless mana and the costly activation keep it niche.

Could be wrong if More blocker-heavy games or commander-damage-focused builds could make the effect more desirable.

It occupies a land slot and can break stalled boards by making a large attacker unblockable, though colorless mana is a real deckbuilding cost.

Could be wrong if Unknown color demands, fixing, removal, and format speed could make the colorless land much worse or better.