Mind Carver 
Artifact — Equipment
When this Equipment enters, attach it to target creature you control.
Equipped creature gets +1/+0. It gets +3/+1 instead as long as an opponent has eight or more cards in their graveyard.
Equip {2}{B}
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Cards that do something similar 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.
Relic Axe 99%
$0.08#19149
"Equipped creature gets +1/+1. If it's a Warrior, it gets +2/+1 instead."
+2 more matching lines
Tenza, Godo's Maul 99%
$1.67#5614
"Equipped creature gets +1/+1. As long as it's legendary, it gets an additional +2/+2. As long as it's red, it has trample."
+1 more matching line
Neglected Heirloom // Ashmouth Blade 94%
$0.24#16117
"Equipped creature gets +1/+1."
+2 more matching lines
Harvest Hand // Scrounged Scythe 94%
$0.22#17642
"Equipped creature gets +1/+1."
+1 more matching line