Somnophore 
Creature — Illusion
$0.44 #26208 0.43 28.0 years
Flying
Whenever this creature deals damage to a player, tap target creature that player controls. That creature doesn't untap during its controller's untap step for as long as this creature remains on the battlefield.
Click a line or tag to filter
Cards similar to Somnophore 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.
Thalakos Dreamsower96%
$0.25↓#256580.3929.0 years
"Whenever this creature deals damage to an opponent, tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped."
Neko-Te92%
$5.27↑#19373↑0.26↓21.7 years↓
"Whenever equipped creature deals damage to a creature, tap that creature. That creature doesn't untap during its controller's untap step for as long as this Equipment remains on the battlefield."
Dungeon Geists86%
$0.16↓#18456↑0.60↑14.7 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature."
Sand Squid86%
$0.59↑#262240.27↓27.0 years
"
: Tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped."
: Tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped."
Deserter's Quarters84%
$0.17↓#298090.32↓12.5 years↓
"
, : Tap target creature. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
, : Tap target creature. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
Abyssal Specter82%
$0.11↓#16566↑0.25↓31.4 years↑
"Flying"
Matsu-Tribe Sniper81%
$0.12↓#18142↑0.25↓21.7 years↓
"Whenever this creature deals damage to a creature, tap that creature and it doesn't untap during its controller's next untap step."
Ty Lee, Chi Blocker80%
$0.31↓#6659↑0.380.9 years↓
"When this card enters, tap up to one target creature. It doesn't untap during its controller's untap step for as long as you control this card."
Entrancing Lyre79%
$0.11↓#234860.18↓6.7 years↓
"
, : Tap target creature with power X or less. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
, : Tap target creature with power X or less. It doesn't untap during its controller's untap step for as long as this artifact remains tapped."
Icefall Regent77%
$0.42↓#13327↑0.83↑11.6 years↓
"When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control this creature."
+1 more matching line
Mawcor76%
$0.31↓#280830.11↓29.0 years
"Flying"
Sigil of Sleep76%
$5.86↑#3375↑0.74↑27.4 years
"Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand."
Mana Skimmer75%
$0.13↓#281200.68↑20.0 years↓
"Whenever this creature deals damage to a player, tap target land that player controls. That land doesn't untap during its controller's next untap step."
Harrier Griffin74%
$0.13↓#257860.18↓20.7 years↓
"At the beginning of your upkeep, tap target creature."
Forgestoker Dragon74%
$0.27↓#218880.07↓12.7 years↓
"Flying"
Shivan Hellkite74%
$0.28↓#19734↑0.00↓28.0 years
"Flying"
Sentinel of the Eternal Watch74%
$0.11↓#17372↑0.4411.3 years↓
"At the beginning of combat on each opponent's turn, tap target creature that player controls."
Soltari Visionary74%
$0.36↓#12384↑0.4728.3 years
"Whenever this creature deals damage to a player, destroy target enchantment that player controls."
Merchant Raiders73%
$0.28↓#7169↑0.53↑5.9 years↓
"Whenever this creature or another Pirate you control enters, tap up to one target creature. That creature doesn't untap during its controller's untap step for as long as you control this creature."
Dream Spoilers73%
$0.14↓#19623↑0.25↓3.1 years↓
"Flying"