Crevasse 
Enchantment
$1.45 #31869 0.31 32.4 years
Creatures with mountainwalk can be blocked as though they didn't have mountainwalk.
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Cards similar to Crevasse expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Deadfall98%
$1.49↑#317390.00↓32.4 years
"Creatures with forestwalk can be blocked as though they didn't have forestwalk."
Quagmire97%
$1.78↑#316790.21↓32.4 years
"Creatures with swampwalk can be blocked as though they didn't have swampwalk."
Undertow96%
$1.62↑#319400.00↓32.4 years
"Creatures with islandwalk can be blocked as though they didn't have islandwalk."
Staff of the Ages96%
$0.57↓#316660.00↓31.4 years↓
"Creatures with landwalk abilities can be blocked as though they didn't have those abilities."
Lord Magnus95%
$3.45↑#309380.2432.4 years
"Creatures with forestwalk can be blocked as though they didn't have forestwalk."
Ur-Drago94%
$18.27↑#312040.00↓32.4 years
"Creatures with swampwalk can be blocked as though they didn't have swampwalk."
Great Wall94%
$1.30↓#308700.05↓32.4 years
"Creatures with plainswalk can be blocked as though they didn't have plainswalk."
Gosta Dirk92%
$18.66↑#309270.07↓32.4 years
"Creatures with islandwalk can be blocked as though they didn't have islandwalk."
Street Savvy78%
$0.05↓#301220.20↓20.5 years↓
"Enchanted creature gets +0/+2 and can block creatures with landwalk abilities as though they didn't have those abilities."