Flesh Reaver 

Creature — Phyrexian Horror
Whenever this creature deals damage to a creature or opponent, this creature deals that much damage to you.
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.
Tephraderm 85%
$0.25#27563
"Whenever a creature deals damage to this creature, this creature deals that much damage to that creature."
Firedrinker Satyr 81%
$0.16#22373
"Whenever this creature is dealt damage, it deals that much damage to you."
Jackal Pup 81%
$0.18#23694
"Whenever this creature is dealt damage, it deals that much damage to you."