Mage Slayer 
Artifact — Equipment
$1.54 #4411 0.08 17.5 years
Whenever equipped creature attacks, it deals damage equal to its power to the player or planeswalker it's attacking.
Equip 
Click a line or tag to filter
Cards similar to Mage Slayer 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.
Hellrider89%
$0.53↓#5745↓0.19↑14.7 years↓
"Whenever a creature you control attacks, this creature deals 1 damage to the player or planeswalker it's attacking."
Cavalcade of Calamity87%
$0.29↓#9839↓0.35↑7.7 years↓
"Whenever a creature you control with power 1 or less attacks, this enchantment deals 1 damage to the player or planeswalker that creature is attacking."
Stalking Vengeance82%
$0.24↓#5361↓0.26↑21.2 years↑
"Whenever another creature you control dies, it deals damage equal to its power to target player or planeswalker."
Raid Bombardment82%
$0.22↓#35780.21↑16.5 years
"Whenever a creature you control with power 2 or less attacks, this enchantment deals 1 damage to the player or planeswalker that creature is attacking."
Surestrike Trident82%
$1.54#14269↓0.1222.7 years↑
"Equipped creature has first strike and "
, Unattach this card: This creature deals damage equal to its power to target player or planeswalker.""
, Unattach this card: This creature deals damage equal to its power to target player or planeswalker.""+1 more matching line
Fiendlash81%
$0.38↓#49580.105.2 years↓
"Whenever equipped creature is dealt damage, it deals damage equal to its power to target player or planeswalker."
Sorcerer's Wand80%
$0.10↓#16243↓0.008.5 years↓
"Equip "
"
Stormbeacon Blade80%
$0.23↓#12316↓0.051.5 years↓
"Equip 
"
"
Lion Heart80%
$0.20↓#13591↓0.001.4 years↓
"Equip "
"
Iconic Shield80%
$0.21↓#24166↓0.20↑0.3 years↓
"Equip "
"
Medic's Kitesail79%
$0.15↓#22841↓0.010.0 years↓
"Equip "
"
Viridian Longbow78%
$0.66↓#46530.1723.0 years↑
"Equip "
"
Hunter's Axe78%
$0.27↓#21550↓0.140.0 years↓
"Equip "
"
Infantry Shield78%
$1.59↑#3216↑0.161.5 years↓
"Equip "
"
Andúril, Narsil Reforged78%
$9.82↑#2600↑0.39↑3.0 years↓
"Equip "
"
Inquisitorial Rosette78%
$2.90↑#7054↓0.184.0 years↓
"Equip "
"
White Mage's Staff77%
$0.16↓#7907↓0.31↑1.4 years↓
"Equip "
"
Livewire Lash77%
$0.19↓#13032↓0.0516.1 years↓
"Equip "
"
Web-Shooters77%
$0.22↓#11420↓0.27↑1.1 years↓
"Equip "
"
Razor Boomerang77%
$0.25↓#27942↓0.0016.7 years
"Equip "
"