Diregraf Colossus 
Creature — Zombie Giant
$0.53 #2061 0.20 10.5 years
This creature enters with a +1/+1 counter on it for each Zombie card in your graveyard.
Whenever you cast a Zombie spell, create a tapped 2/2 black Zombie creature token.
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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.
Unbreathing Horde92%
$0.27↓#8318↓0.1915.1 years↑
"This creature enters with a +1/+1 counter on it for each other Zombie you control and each Zombie card in your graveyard."
Champion of the Perished84%
$0.33↓#2674↓0.215.1 years↓
"Whenever another Zombie you control enters, put a +1/+1 counter on this creature."
Headless Rider82%
$0.83↑#2741↓0.134.9 years↓
"Whenever this creature or another nontoken Zombie you control dies, create a 2/2 black Zombie creature token."
Endless Ranks of the Dead80%
$1.04↑#23610.34↑15.1 years↑
"At the beginning of your upkeep, create X 2/2 black Zombie creature tokens, where X is half the number of Zombies you control, rounded down."
Mummy Paramount79%
$0.05↓#26659↓0.00↓9.3 years↓
"Whenever another Zombie you control enters, this creature gets +1/+1 until end of turn."
Prophet of the Scarab78%
$0.27↓#5279↓0.35↑1.7 years↓
"When this creature enters, draw cards equal to the number of Zombies you control or the number of Zombie cards in your graveyard, whichever is greater."
Necroduality78%
$6.04↑#3040↓0.48↑4.9 years↓
"Whenever a nontoken Zombie you control enters, create a token that's a copy of that creature."
Golgari Raiders76%
$0.18↓#22122↓0.198.0 years↓
"This creature enters with a +1/+1 counter on it for each creature card in your graveyard."
Geralf, the Fleshwright74%
$1.04↑#6996↓0.55↑2.5 years↓
"Whenever a Zombie you control enters, put a +1/+1 counter on it for each other Zombie that entered the battlefield under your control this turn."
+1 more matching line
Wilhelt, the Rotcleaver74%
$9.85↑#2754↓0.51↑5.1 years↓
"Whenever another Zombie you control dies, if it didn't have decayed, create a 2/2 black Zombie creature token with decayed."
+1 more matching line
Rhizome Lurcher74%
$0.18↓#18428↓0.33↑8.0 years↓
"This creature enters with a number of +1/+1 counters on it equal to the number of creature cards in your graveyard."
Soulless One74%
$0.23↓#14047↓0.00↓24.0 years↑
"this card's power and toughness are each equal to the number of Zombies on the battlefield plus the number of Zombie cards in all graveyards."
Zombie Mob72%
$0.19↓#31576↓0.57↑30.0 years↑
"This creature enters with a +1/+1 counter on it for each creature card in your graveyard."
Voracious Brood72%
$0.35↓#25025↓0.08↓0.3 years↓
"This creature enters with a +1/+1 counter on it for each creature card in your graveyard."
Rooftop Storm71%
$2.49↑#22720.80↑15.1 years↑
"You may pay 
rather than pay the mana cost for Zombie creature spells you cast."
rather than pay the mana cost for Zombie creature spells you cast."
Ghoulraiser71%
$0.03↓#18851↓0.2215.1 years↑
"When this creature enters, return a Zombie card at random from your graveyard to your hand."
Liliana, the Last Hope70%
$4.90↑#7753↓0.2610.2 years
"−7: You get an emblem with "At the beginning of your end step, create X 2/2 black Zombie creature tokens, where X is two plus the number of Zombies you control.""
Embodiment of Agonies70%
$0.40↓#16260↓0.07↓7.3 years↓
"This creature enters with a +1/+1 counter on it for each different mana cost among nonland cards in your graveyard."
Marauding Boneslasher70%
$0.05↓#28490↓0.44↑9.3 years↓
"This creature can't block unless you control another Zombie."
Rot Hulk70%
$0.33↓#5409↓0.297.9 years↓
"When this creature enters, return up to X target Zombie cards from your graveyard to the battlefield, where X is the number of opponents you have."