Wizened Mentor 
Creature — Zombie Cleric
$0.28 #7655 0.06 1.7 years
Whenever an opponent activates an ability of a permanent that isn't a mana ability, you create a 1/1 white Zombie creature token. This ability triggers only once each turn.
Click a line or tag to filter
Cards similar to Wizened Mentor 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.
Runic Armasaur84%
$2.32↑#2481↑0.28↑8.3 years↑
"Whenever an opponent activates an ability of a creature or land that isn't a mana ability, you may draw a card."
Harsh Mentor82%
$0.34↑#2515↑0.47↑9.5 years↑
"Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, this creature deals 2 damage to that player."
Immolation Shaman77%
$0.43↑#77350.117.7 years↑
"Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player."
Burning-Tree Shaman76%
$0.31↑#22677↓0.20↑20.7 years↑
"Whenever a player activates an ability that isn't a mana ability, this creature deals 1 damage to that player."
Flamescroll Celebrant // Revel in Silence75%
$0.32↑#11852↓0.33↑5.5 years↑
"Whenever an opponent activates an ability that isn't a mana ability, this creature deals 1 damage to that player."
Avalanche of Sector 770%
$0.24↓#10047↓0.111.4 years
"Whenever an opponent activates an ability of an artifact they control, this card deals 1 damage to that player."
Dragonlair Spider70%
$0.49↑#83670.31↑14.4 years↑
"Whenever an opponent casts a spell, create a 1/1 green Insect creature token."
Powerleech70%
$20.88↑#21624↓0.33↑32.6 years↑
"Whenever an artifact an opponent controls becomes tapped or an opponent activates an artifact's ability without 
in its activation cost, you gain 1 life."
in its activation cost, you gain 1 life."