Goblin Rock Sled 

Creature — Goblin
Trample
This creature doesn't untap during your untap step if it attacked during your last turn.
This creature can't attack unless defending player controls a Mountain.
click a line to search just that ability, click more to combine them
Cards that do something similar 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.
Colossus of Sardia 98%
#22807
"This creature doesn't untap during your untap step."
+1 more matching line
Black Carriage 98%
$0.82#29357
"This creature doesn't untap during your untap step."
+1 more matching line
Altar Golem 98%
$0.50#20213
"This creature doesn't untap during your untap step."
+1 more matching line