Rampaging Geoderm 
Creature — Dinosaur Beast
$0.20 #22084 0.19 3.4 years
Trample, haste
Whenever you attack, target attacking creature gets +1/+1 until end of turn. If it's attacking a battle, put a +1/+1 counter on it instead.
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Cards similar to Rampaging Geoderm 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.
Armasaur Guide83%
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"Whenever you attack with three or more creatures, put a +1/+1 counter on target creature you control."
Andúril, Narsil Reforged80%
$15.41↑#2604↑0.41↑2.8 years
"Whenever equipped creature attacks, put a +1/+1 counter on each creature you control. If you have the city's blessing, put two +1/+1 counters on each creature you control instead."
Urdnan, Dromoka Warrior78%
$0.37↑#7842↑0.131.8 years↓
"Whenever you attack, target attacking creature with a +1/+1 counter on it gains first strike until end of turn. If that creature has two or more +1/+1 counters on it, it gains double strike until end of turn instead."
Armory of Iroas78%
$0.22↑#7937↑0.2212.3 years↑
"Whenever equipped creature attacks, put a +1/+1 counter on it."
Bone Sabres78%
$5.73↑#5958↑0.243.9 years
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Surgical Suite // Hospital Room76%
$0.28↑#8436↑0.251.9 years↓
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Thrashing Frontliner76%
$0.05↓#28466↓0.00↓3.4 years
"Whenever this creature attacks a battle, it gets +1/+1 until end of turn."
+1 more matching line
Marshal of the Lost74%
$0.21↑#12418↑0.211.4 years↓
"Whenever you attack, target creature gets +X/+X until end of turn, where X is the number of attacking creatures."
Casey Jones, Back Alley Brute74%
$0.31↑#7643↑0.00↓0.5 years↓
"Whenever this card attacks, put a +1/+1 counter on target attacking creature."
Glory Bearers74%
$0.03↓#261220.33↑6.6 years↑
"Whenever another creature you control attacks, it gets +0/+1 until end of turn."
Fervent Charge74%
$0.42↑#5232↑0.2525.3 years↑
"Whenever a creature you control attacks, it gets +2/+2 until end of turn."
Gleam of Battle74%
$0.16↓#13575↑0.2013.3 years↑
"Whenever a creature you control attacks, put a +1/+1 counter on it."
Rhuk, Hexgold Nabber73%
$0.24↑#17326↑0.273.6 years
"Trample, haste"
Leader's Talent72%
$0.62↑#10284↑0.00↓0.5 years↓
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Black Panther, Claws of Bast72%
$2.06↑#222630.00↓0.2 years↓
"Whenever a creature you control attacks alone, put a +1/+1 counter on it."
War-Trained Slasher72%
$0.17↓#247480.273.4 years
"Whenever this creature attacks a battle, double its power until end of turn."
Ranger Class72%
$0.38↑#7478↑0.175.1 years↑
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Demolisher Spawn72%
$0.35↑#5978↑0.221.9 years↓
"Trample, haste"
Fire Nation Engineer71%
$0.13↓#17197↑0.00↓0.8 years↓
"At the beginning of your end step, if you attacked this turn, put a +1/+1 counter on another target creature or Vehicle you control."
Yidaro, Wandering Monster71%
$0.27↑#7946↑0.00↓6.4 years↑
"Trample, haste"