Herald of War 
Creature — Angel
$0.85 #3016 0.29 14.5 years
Flying
Whenever this creature attacks, put a +1/+1 counter on it.
Angel spells and Human spells you cast cost 
less to cast for each +1/+1 counter on this creature.
less to cast for each +1/+1 counter on this creature.Click a line or tag to filter
Cards similar to Herald of War 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.
Starnheim Aspirant84%
$2.80↑#29880.275.7 years↓
"Angel spells you cast cost 
less to cast."
less to cast."
Patagia Tiger84%
$0.11↓#29117↓0.00↓6.5 years↓
"Flying"
Lyra Dawnbringer82%
$0.53↓#1740↑0.328.5 years↓
"Flying"
Casey Jones, Back Alley Brute80%
$0.31↓#7179↓0.320.6 years↓
"Whenever this card attacks, put a +1/+1 counter on target attacking creature."
+1 more matching line
Ezio, Brash Novice78%
$0.21↓#13012↓0.18↓2.3 years↓
"Whenever this card attacks, put a +1/+1 counter on it."
Resplendent Griffin78%
$0.11↓#28706↓0.00↓8.8 years↓
"Whenever this creature attacks, if you have the city's blessing, put a +1/+1 counter on it."
Rubblebelt Raiders77%
$0.13↓#18863↓0.00↓13.7 years
"Whenever this creature attacks, put a +1/+1 counter on it for each attacking creature you control."
Big Mother Mouser76%
$1.28↑#4796↓0.310.6 years↓
"Whenever this creature attacks, double the number of +1/+1 counters on it."
Oran-Rief Ooze76%
$0.30↓#7813↓0.206.1 years↓
"Whenever this creature attacks, put a +1/+1 counter on each attacking creature with a +1/+1 counter on it."
Leatherhead, Iron Gator76%
$0.28↓#8748↓0.340.6 years↓
"Whenever this card attacks, put two +1/+1 counters on each creature you control."
Markov Dreadknight76%
$0.15↓#23714↓0.06↓10.5 years↓
"Flying"
Knight of Wundagore75%
$0.08↓#19783↓0.11↓0.3 years↓
"Whenever you put a +1/+1 counter on another creature, put a +1/+1 counter on this creature. This ability triggers only once each turn."
Enduring Scalelord75%
$0.13↓#11439↓0.00↓11.6 years↓
"Whenever one or more +1/+1 counters are put on another creature you control, you may put a +1/+1 counter on this creature."
Aven Warhawk75%
$0.22↓#28973↓0.06↓23.7 years↑
"Flying"
Untethered Express74%
$0.24↓#13307↓0.06↓9.7 years↓
"Whenever this Vehicle attacks, put a +1/+1 counter on it."
Air Nomad Student74%
$0.17↓#24735↓0.09↓0.9 years↓
"At the beginning of your end step, if this creature didn't attack this turn, put a +1/+1 counter on it."
Botanical Brawler74%
$0.26↓#6899↓0.06↓3.5 years↓
"Whenever one or more +1/+1 counters are put on another permanent you control, if it's the first time +1/+1 counters have been put on that permanent this turn, put a +1/+1 counter on this creature."
Bladed Bracers74%
$0.12↓#17818↓0.00↓14.5 years
"As long as equipped creature is a Human or an Angel, it has vigilance."
Fangren Firstborn74%
$2.18↑#15724↓0.2622.7 years↑
"Whenever this creature attacks, put a +1/+1 counter on each attacking creature."
Dromoka Captain74%
$0.09↓#26378↓0.00↓11.6 years↓
"Whenever this creature attacks, bolster 1."