Hunter's Mark 

Instant
This spell costs {3} less to cast if it targets a blue permanent you don't control.
This spell can't be countered.
Target creature you control gets +1/+1 until end of turn. Then it deals damage equal to its power to target creature or planeswalker you don't control.
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.
Clear Shot 100%
$0.08#11880
"Target creature you control gets +1/+1 until end of turn. It deals damage equal to its power to target creature you don't control."
Rabid Gnaw 100%
$0.20#7808
"Target creature you control gets +1/+0 until end of turn. Then it deals damage equal to its power to target creature you don't control."
Assert Perfection 100%
$0.13#17466
"Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to up to one target creature an opponent controls."
Ambuscade 99%
$0.11#19478
"Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to target creature an opponent controls."
Huatli's Final Strike 99%
$0.10#18495
"Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to target creature an opponent controls."
Cheeky House-Mouse // Squeak By 99%
$0.31#10106
"Target creature you control gets +1/+1 until end of turn. It can't be blocked by creatures with power 3 or greater this turn."
Swift Kick 99%
$0.03#25321
"Target creature you control gets +1/+0 until end of turn. It fights target creature you don't control."
Chelonian Tackle 98%
$0.20#19374
"Target creature you control gets +0/+10 until end of turn. Then it fights up to one target creature an opponent controls."
Rhino's Rampage 98%
$0.49#12449
"Target creature you control gets +1/+0 until end of turn. It fights target creature an opponent controls. When excess damage is dealt to the creature an opponent controls this way, destroy up to one target noncreature artifact with mana value 3 or less."
Mage Duel 97%
$0.10#21489
"Target creature you control gets +1/+2 until end of turn. Then it fights target creature you don't control."
+1 more matching line
Ruthless Predation 97%
$0.16#18582
"Target creature you control gets +1/+2 until end of turn. It fights target creature you don't control."
Epic Confrontation 97%
$0.08#15665
"Target creature you control gets +1/+2 until end of turn. It fights target creature you don't control."
Shell Shield 95%
$0.07#15748
"Target creature you control gets +0/+3 until end of turn. If this spell was kicked, that creature also gains hexproof until end of turn."
Throw from the Saddle 95%
$0.08#18387
"Target creature you control gets +1/+1 until end of turn. Put a +1/+1 counter on it instead if it's a Mount. Then it deals damage equal to its power to target creature you don't control."
Torch Breath 92%
$0.17#19252
"This spell costs {2} less to cast if it targets a blue permanent."
+1 more matching line
Bionic Blow 91%
$0.35#29278
"Target creature you control gets +X/+0 until end of turn. Then it deals damage equal to its power to up to one other target creature."
Primal Might 90%
#3932
"Target creature you control gets +X/+X until end of turn. Then it fights up to one target creature you don't control."
Oracle's Restoration 88%
$0.16#15584
"Target creature you control gets +1/+1 until end of turn. You draw a card and gain 1 life."
Spoils of the Hunt 87%
$0.05#27064
"Target creature you control gets +1/+0 until end of turn for each mana from a Treasure that was spent to cast this spell. Then that creature deals damage equal to its power to target creature an opponent controls."