Demon's Horn 
Artifact
$0.21 #6565 0.12 22.7 years
Whenever a player casts a black spell, you may gain 1 life.
Click a line or tag to filter
Cards similar to Demon's Horn 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.
Sol'kanar the Swamp King100%
$0.17↓#20022↓0.1232.4 years↑
"Whenever a player casts a black spell, you gain 1 life."
Throne of Bone97%
$0.16↓#24594↓0.0633.2 years↑
"Whenever a player casts a black spell, you may pay 
. If you do, you gain 1 life."
. If you do, you gain 1 life."
Bog Gnarr90%
$0.13↓#32081↓0.00↓25.4 years↑
"Whenever a player casts a black spell, this creature gets +2/+2 until end of turn."
Smolder Initiate86%
$0.18↓#28259↓0.2018.5 years↓
"Whenever a player casts a black spell, you may pay . If you do, target player loses 1 life."
. If you do, target player loses 1 life."
Purraj of Urborg84%
$0.97↑#28958↓0.00↓30.0 years↑
"Whenever a player casts a black spell, you may pay 
. If you do, put a +1/+1 counter on Purraj."
. If you do, put a +1/+1 counter on Purraj."
Dragon's Claw79%
$0.20↓#14081↓0.00↓22.7 years
"Whenever a player casts a red spell, you may gain 1 life."
Kraken's Eye78%
$0.10↓#15676↓0.0522.7 years
"Whenever a player casts a blue spell, you may gain 1 life."
Onyx Talisman78%
$0.36↑#25732↓0.29↑31.4 years↑
"Whenever a player casts a black spell, you may pay 
. If you do, untap target permanent."
. If you do, untap target permanent."
Snake Pit78%
$0.28↑#14073↓0.1227.0 years↑
"Whenever an opponent casts a blue or black spell, you may create a 1/1 green Snake creature token."
Kor Firewalker78%
$0.20↓#25224↓0.29↑16.7 years↓
"Whenever a player casts a red spell, you may gain 1 life."
Freyalise's Charm78%
$0.16↓#29946↓0.35↑31.4 years↑
"Whenever an opponent casts a black spell, you may pay 
. If you do, you draw a card."
. If you do, you draw a card."
Iron Star78%
$0.15↓#27454↓0.24↑33.2 years↑
"Whenever a player casts a red spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Crystal Rod77%
$0.14↓#26801↓0.00↓33.2 years↑
"Whenever a player casts a blue spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Angel's Feather77%
$0.21#10015↓0.0622.7 years
"Whenever a player casts a white spell, you may gain 1 life."
Urza's Chalice77%
$1.11↑#24159↓0.0632.6 years↑
"Whenever a player casts an artifact spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Wurm's Tooth76%
$0.14↓#14141↓0.00↓22.7 years
"Whenever a player casts a green spell, you may gain 1 life."
Radiant Essence76%
$0.23↑#32256↓0.00↓30.0 years↑
"This creature gets +1/+2 as long as an opponent controls a black permanent."
Mold Adder76%
$0.12↓#14685↓0.2017.3 years↓
"Whenever an opponent casts a blue or black spell, you may put a +1/+1 counter on this creature."
Witchstalker75%
$0.29↑#19155↓0.00↓13.3 years↓
"Whenever an opponent casts a blue or black spell during your turn, put a +1/+1 counter on this creature."
Ivory Cup75%
$0.17↓#24997↓0.1833.2 years↑
"Whenever a player casts a white spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."