Bloodhall Ooze 
Creature — Ooze
$0.50 #21772 0.00 17.7 years
At the beginning of your upkeep, if you control a black permanent, you may put a +1/+1 counter on this creature.
At the beginning of your upkeep, if you control a green permanent, you may put a +1/+1 counter on this creature.
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Cards similar to Bloodhall Ooze 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.
Reverent Hunter89%
$0.22↓#193330.27↑13.1 years↓
"When this creature enters, put a number of +1/+1 counters on it equal to your devotion to green."
Ashenmoor Cohort84%
$0.18↓#31684↓0.0018.5 years
"This creature gets +1/+1 as long as you control another black creature."
Ring of Kalonia83%
$0.36↓#9143↑0.0614.3 years↓
"At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's green."
Crabapple Cohort81%
$0.11↓#29891↓0.0018.5 years
"This creature gets +1/+1 as long as you control another green creature."
Ring of Xathrid80%
$0.53↑#6965↑0.24↑14.3 years↓
"At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's black."
Purraj of Urborg79%
$0.97↑#28958↓0.0030.0 years↑
"Whenever a player casts a black spell, you may pay 
. If you do, put a +1/+1 counter on Purraj."
. If you do, put a +1/+1 counter on Purraj."
Rushwood Elemental78%
$1.04↑#28334↓0.0027.0 years↑
"At the beginning of your upkeep, you may put a +1/+1 counter on this creature."
Mountain Titan78%
$0.58↑#32012↓0.0031.4 years↑
"
: Until end of turn, whenever you cast a black spell, put a +1/+1 counter on this creature."
: Until end of turn, whenever you cast a black spell, put a +1/+1 counter on this creature."
Ivy Lane Denizen78%
$0.20↓#2484↑0.22↑13.7 years↓
"Whenever another green creature you control enters, put a +1/+1 counter on target creature."
Yorvo, Lord of Garenbrig78%
$0.29↓#9539↑0.37↑7.0 years↓
"Whenever another green creature you control enters, put a +1/+1 counter on this card. Then if that creature's power is greater than this card's power, put another +1/+1 counter on this card."
+1 more matching line
K'rrik, Son of Yawgmoth76%
$1.08↑#1080↑1.39↑7.2 years↓
"Whenever you cast a black spell, put a +1/+1 counter on this card."
Titania's Chosen75%
$0.27↓#174530.0628.0 years↑
"Whenever a player casts a green spell, put a +1/+1 counter on this creature."
Oran-Rief, the Vastwood74%
$0.38↓#741↑0.14↑17.0 years
"
: Put a +1/+1 counter on each green creature that entered this turn."
: Put a +1/+1 counter on each green creature that entered this turn."
Quirion Dryad73%
$0.09↓#252940.13↑25.7 years↑
"Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on this creature."
Child of the Volcano73%
$0.12↓#233220.062.9 years↓
"At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature."
Noxious Hatchling72%
$0.38↓#203520.21↑18.2 years
"Whenever you cast a black spell, remove a -1/-1 counter from this creature."
+1 more matching line
Shrine of Limitless Power72%
$0.17↓#26998↓0.28↑15.4 years↓
"At the beginning of your upkeep and whenever you cast a black spell, put a charge counter on this artifact."
Defiler of Vigor72%
$3.28↑#1644↑0.46↑4.1 years↓
"Whenever you cast a green permanent spell, put a +1/+1 counter on each creature you control."
Bog Gnarr72%
$0.13↓#32081↓0.0025.4 years↑
"Whenever a player casts a black spell, this creature gets +2/+2 until end of turn."
Air Nomad Student72%
$0.17↓#247350.090.9 years↓
"At the beginning of your end step, if this creature didn't attack this turn, put a +1/+1 counter on it."