Gamma Grotesque 

Creature — Gamma Horror Villain
$0.38 #22808 0.00 0.2 years
Vigilance (Attacking doesn't cause this creature to tap.)
Power-up — 

: Put three +1/+1 counters on this creature. Then draw a card for each creature you control with a counter on it. (Activate each power-up ability only once. Reduce the cost by its mana cost if it entered this turn.)
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Cards similar to Gamma Grotesque 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.
Bold Biochemist96%
$0.08↓#270360.000.2 years
"Power-up — 
: Put a +1/+1 counter on this creature and draw two cards."
Goliath, Mass Manipulator94%
$0.23↓#236720.000.2 years
"Power-up — 
: Put two +1/+1 counters on this card. Then draw a card for each creature you control with power 4 or greater."
Serpent Specialist90%
$0.18↓#184690.000.2 years
"Power-up — 
: Put two +1/+1 counters on this creature."
Volcanic Villain90%
$0.11↓#254930.000.2 years
"Power-up — 
: Put two +1/+1 counters on this creature."
Aerial Doombot90%
$0.17↓#200220.000.2 years
"Power-up — 
: Put three +1/+1 counters on this creature."
Hazard of the Dunes88%
$0.14↓#17758↑0.12↑1.6 years↑
"Exhaust — 
: Put three +1/+1 counters on this creature."
Skystreak Engineer87%
$0.06↓#257240.091.6 years↑
"Exhaust — 
: Put two +1/+1 counters on this creature."
Prowcatcher Specialist87%
$0.08↓#205010.13↑1.6 years↑
"Exhaust — 
: Put two +1/+1 counters on this creature."
Namora, the Sea Queen86%
$0.28↓#254410.000.2 years
"Power-up — 
: Put a +1/+1 counter on this card. Create two 1/1 blue Merfolk creature tokens."
Ultron Drone85%
$0.25↓#17330↑0.000.2 years
"Power-up —
: Put two +1/+1 counters on this creature and create a 2/2 colorless Robot Villain artifact creature token."
Peema Trailblazer84%
$0.21↓#9720↑0.11↑1.6 years↑
"Exhaust — Pay six
: Put two +1/+1 counters on this creature. Then draw cards equal to the greatest power among creatures you control."
Mild-Mannered Librarian84%
$0.09↓#218420.003.8 years↑
"
: This creature becomes a Werewolf. Put two +1/+1 counters on it and you draw a card. Activate only once."
Brawn, Amadeus Cho84%
$0.20↓#228850.000.2 years
"Power-up — 
: Put a +1/+1 counter on this card for each card in your hand."
Shang-Chi, Martial Mentor84%
$0.61↑#183570.000.2 years
"Power-up — 

: Put three +1/+1 counters on this card."
Greasewrench Goblin84%
$0.26↓#17637↑0.12↑1.6 years↑
"Exhaust — 
: Discard up to two cards, then draw that many cards. Put a +1/+1 counter on this creature."
Mindspring Merfolk84%
$0.50↑#10419↑0.14↑1.6 years↑
"Exhaust — 

,
: Draw X cards. Put a +1/+1 counter on each Merfolk creature you control."
Stampeding Scurryfoot84%
$0.13↓#218950.20↑1.6 years↑
"Exhaust — 
: Put a +1/+1 counter on this creature. Create a 3/3 green Elephant creature token."
Keen Buccaneer84%
$0.15↓#197580.001.6 years↑
"Exhaust — 
: Draw a card, then discard a card. Put a +1/+1 counter on this creature."
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