Pith Driller 
Artifact Creature — Phyrexian Horror
$0.15 #28174 0.28 15.4 years
( can be paid with either 
or 2 life.)
can be paid with either or 2 life.)When this creature enters, put a -1/-1 counter on target creature.
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Cards similar to Pith Driller 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.
Cultbrand Cinder90%
$0.11↓#306590.00↓18.5 years↑
"When this creature enters, put a -1/-1 counter on target creature."
Skinrender90%
$0.23↑#5692↑0.69↑16.1 years
"When this creature enters, put three -1/-1 counters on target creature."
Dismember88%
$2.11↑#919↑0.39↑15.4 years
"Target creature gets -5/-5 until end of turn."
Blight Rot84%
$0.28↑#8917↑0.04↓0.7 years↓
"Put four -1/-1 counters on target creature."
Scar84%
$0.23↑#19802↑0.1918.5 years↑
"Put a -1/-1 counter on target creature."
Banewhip Punisher82%
$0.25↑#11192↑0.06↓9.3 years↓
"When this creature enters, you may put a -1/-1 counter on target creature."
Contagion Clasp81%
$0.34↑#1416↑0.2916.1 years
"When this artifact enters, put a -1/-1 counter on target creature."
Instill Infection80%
$0.09↓#241670.3516.1 years
"Put a -1/-1 counter on target creature."
Eyeblight Assassin80%
$0.09↓#22239↑0.06↓11.3 years↓
"When this creature enters, target creature an opponent controls gets -1/-1 until end of turn."
Blister Beetle80%
$0.04↓#250260.43↑18.0 years↑
"When this creature enters, target creature gets -1/-1 until end of turn."
Farbog Boneflinger80%
$0.08↓#309450.18↓14.7 years
"When this creature enters, target creature gets -2/-2 until end of turn."
Cartouche of Ambition79%
$0.14↓#15685↑0.259.5 years↓
"When this Aura enters, you may put a -1/-1 counter on target creature."
Fourth Bridge Prowler79%
$0.22↑#15029↑0.06↓9.7 years↓
"When this creature enters, you may have target creature get -1/-1 until end of turn."
Soul Snuffers79%
$0.26↑#4957↑0.56↑18.2 years↑
"When this creature enters, put a -1/-1 counter on each creature."
Grim Affliction79%
$0.28↑#4567↑0.3015.4 years
"Put a -1/-1 counter on target creature, then proliferate."
Keening Banshee78%
$0.12↓#276740.13↓21.2 years↑
"When this creature enters, target creature gets -2/-2 until end of turn."
Skulking Killer78%
$0.03↓#256200.06↓4.9 years↓
"When this creature enters, target creature an opponent controls gets -2/-2 until end of turn if that opponent controls no other creatures."
Ambush Gigapede78%
$0.15#20735↑0.06↓2.5 years↓
"When this creature enters, target creature an opponent controls gets -2/-2 until end of turn."
Gnarled Effigy78%
$0.15#277690.07↓18.5 years↑
", 
: Put a -1/-1 counter on target creature."
, : Put a -1/-1 counter on target creature."
Fume Spitter77%
$0.19↑#11082↑0.2716.1 years
"Sacrifice this creature: Put a -1/-1 counter on target creature."