Segovian Leviathan 
Creature — Leviathan
$0.25 #28101 0.00 32.4 years
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Click a line or tag to filter
Cards similar to Segovian Leviathan 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.
Meandering Towershell86%
$0.19↓#19618↑0.44↑12.1 years↓
"Islandwalk"
Zodiac Rooster83%
$27.71↑#260310.0027.5 years↓
"Plainswalk"
Dandân71%
$1.34↑#21784↑0.33↑32.8 years
"This creature can't attack unless defending player controls an Island."