Rex, Cyber-Hound 
Legendary Artifact Creature — Robot Dog
$0.28 #9737 0.00 2.5 years
Whenever Rex deals combat damage to a player, they mill two cards and you get 
(two energy counters).
(two energy counters).Pay : Choose target creature card in a graveyard. Exile it with a brain counter on it. Activate only as a sorcery.
: Choose target creature card in a graveyard. Exile it with a brain counter on it. Activate only as a sorcery.Rex has all activated abilities of all cards in exile with brain counters on them.
Click a line or tag to filter
Cards similar to Rex, Cyber-Hound 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.
Longtusk Cub78%
$0.17↓#20802↓0.079.9 years↑
"Whenever this creature deals combat damage to a player, you get ."
."
Mairsil, the Pretender78%
$0.40↑#18471↓0.47↑9.0 years↑
"this card has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn."
Aurora Shifter76%
$0.31↑#7662↑0.072.2 years
"Whenever this creature deals combat damage to a player, you get that many ."
."
Peema Trailblazer75%
$0.21↓#97200.11↑1.6 years
"Whenever this creature deals combat damage to a player, you get that many ."
."
Agatha's Soul Cauldron74%
$35.79↑#1375↑1.18↑3.0 years
"
: Exile target card from a graveyard. When a creature card is exiled this way, put a +1/+1 counter on target creature you control."
: Exile target card from a graveyard. When a creature card is exiled this way, put a +1/+1 counter on target creature you control."+1 more matching line
Shriekgeist72%
$0.13↓#23593↓0.0014.6 years↑
"Whenever this creature deals combat damage to a player, that player mills two cards."
Patchwork Crawler72%
$0.14↓#20190↓0.11↑4.8 years↑
"
: Exile target creature card from your graveyard and put a +1/+1 counter on this creature."
: Exile target creature card from your graveyard and put a +1/+1 counter on this creature."+1 more matching line
Empyreal Voyager72%
$0.09↓#18670↓0.12↑9.9 years↑
"Whenever this creature deals combat damage to a player, you get that many ."
."
Myr Welder72%
$2.78↑#7514↑0.15↑15.6 years↑
"This creature has all activated abilities of all cards exiled with it."
+1 more matching line
Heirloom Mirror // Inherited Fiend72%
$0.17↓#18549↓0.074.9 years↑
"
: Exile target creature card from a graveyard. Put a +1/+1 counter on this creature."
: Exile target creature card from a graveyard. Put a +1/+1 counter on this creature."
Automated Assembly Line71%
$0.33↑#7476↑0.25↑2.5 years
"Whenever one or more artifact creatures you control deal combat damage to a player, you get ."
."
Minister of Inquiries71%
$0.15↓#19395↓0.009.9 years↑
"When this creature enters, you get ."
."
Solstice Zealot70%
$0.15↓#22832↓0.062.2 years
"When this creature enters, you get ."
."
Aethersquall Ancient70%
$0.19↓#6637↑0.45↑9.9 years↑
"At the beginning of your upkeep, you get ."
."
Electrozoa70%
$0.15↓#26232↓0.002.2 years
"When this creature enters, you get ."
."
Spontaneous Artist70%
$0.13↓#26132↓0.069.9 years↑
"When this creature enters, you get ."
."