No Quarter 

Enchantment
Whenever a creature becomes blocked by a creature with lesser power, destroy the blocking creature.
Whenever a creature blocks a creature with lesser power, destroy the attacking creature.
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.
Evil Eye of Urborg 87%
$0.24#11870
"Whenever this creature becomes blocked by a creature, destroy that creature."
Sylvan Basilisk 87%
$0.36#24347
"Whenever this creature becomes blocked by a creature, destroy that creature."
Phyrexian Reaper 84%
$0.10#30076
"Whenever this creature becomes blocked by a green creature, destroy that creature. It can't be regenerated."
Order of the Mirror // Order of the Alabaster Host 84%
$0.09#27601
"Whenever this creature becomes blocked by a creature, the blocking creature gets -1/-1 until end of turn."
Infernal Medusa 80%
$5.93#26814
"Whenever this creature blocks a creature, destroy that creature at end of combat."
+1 more matching line