Is Crevasse legal in Standard, Modern, and Commander?

Crevasse is legal in: Legacy, Vintage, Commander.

What type of card is Crevasse?

Crevasse is an Enchantment. Its oracle text reads: "Creatures with mountainwalk can be blocked as though they didn't have mountainwalk."

Enchantment

Creatures with mountainwalk can be blocked as though they didn't have mountainwalk.

Set Legends

Rarity Uncommon

Artist Rob Alexander

Enchantment Commander Legacy Vintage