Bioessence Hydra 
Creature — Hydra Mutant
$0.28 #17751 0.35 7.5 years
Trample
This creature enters with a +1/+1 counter on it for each loyalty counter on planeswalkers you control.
Whenever one or more loyalty counters are put on planeswalkers you control, put that many +1/+1 counters on this creature.
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Cards similar to Bioessence Hydra 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.
Rising Populace88%
$0.05↓#22546↓0.11↓7.5 years
"Whenever another creature or planeswalker you control dies, put a +1/+1 counter on this creature."
Brokers Ascendancy86%
$2.35↑#2866↑0.22↓4.5 years↓
"At the beginning of your end step, put a +1/+1 counter on each creature you control and a loyalty counter on each planeswalker you control."
Guardian of the Halls84%
$0.09↓#192490.08↓0.2 years↓
"Trample"
Scab-Clan Mauler84%
$0.04↓#27657↓0.10↓21.2 years↑
"Trample"
Rushwood Elemental82%
$1.04↑#28334↓0.00↓27.0 years↑
"At the beginning of your upkeep, you may put a +1/+1 counter on this creature."
+1 more matching line
Hobblefiend82%
$0.29↑#163030.00↓6.3 years↓
"Trample"
Machinesmith Automaton81%
$0.15↓#163900.15↓0.3 years↓
"Trample"
Savageborn Hydra80%
$0.45↑#11740↑0.12↓13.5 years↑
"This creature enters with X +1/+1 counters on it."
Big Bertha80%
$0.31↑#23350↓0.380.3 years↓
"this card enters with X +1/+1 counters on her."
Malamet Veteran80%
$0.14↓#202940.00↓2.9 years↓
"Trample"
Child of the Volcano79%
$0.12↓#23322↓0.06↓2.9 years↓
"At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature."
Sandsteppe War Riders78%
$0.14↓#206680.00↓3.5 years↓
"Trample"
Air Nomad Student78%
$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."
Pyroceratops78%
$0.21↓#186780.00↓6.5 years
"Trample"
Savanti Romero, Time's Exile78%
$0.27↓#14048↑0.21↓0.6 years↓
"Trample"
Herald of Ilharg77%
$3.26↑#11696↑0.352.7 years↓
"Trample"
Pyre Hound77%
$0.07↓#193390.19↓10.5 years↑
"Trample"
Deep Goblin Skulltaker76%
$0.15↓#190930.00↓2.9 years↓
"At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature."
Managorger Hydra76%
$0.36↑#1022↑0.48↑11.3 years↑
"Trample"
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$0.30↑#23512↓0.12↓0.3 years↓
"Trample"