Aether Herder 
Creature — Elf Artificer Druid
$0.05 #25299 0.67 9.6 years
When this creature enters, you get 
(two energy counters).
(two energy counters).Whenever this creature attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token.
. If you do, create a 1/1 colorless Servo artifact creature token.Click a line or tag to filter
Cards similar to Aether Herder 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.
Aether Inspector100%
$0.07↑#247770.25↓9.6 years
"Whenever this creature attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token."
. If you do, create a 1/1 colorless Servo artifact creature token."+1 more matching line
Aether Chaser100%
$0.24↑#19417↑0.00↓9.6 years
"Whenever this creature attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token."
. If you do, create a 1/1 colorless Servo artifact creature token."+1 more matching line
Aether Poisoner100%
$0.19↑#231980.06↓9.6 years
"Whenever this creature attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token."
. If you do, create a 1/1 colorless Servo artifact creature token."+1 more matching line
Aether Swooper100%
$0.26↑#18843↑0.05↓9.6 years
"Whenever this creature attacks, you may pay . If you do, create a 1/1 colorless Servo artifact creature token."
. If you do, create a 1/1 colorless Servo artifact creature token."+1 more matching line
Thriving Rats88%
$0.08↑#242490.29↓9.9 years
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Thriving Ibex88%
$0.05#272830.27↓9.9 years
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Thriving Turtle88%
$0.11↑#203850.20↓9.9 years
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Thriving Grubs88%
$0.05#260040.22↓9.9 years
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Thriving Rhino88%
$0.09↑#265400.31↓9.9 years
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Spontaneous Artist88%
$0.13↑#261320.06↓9.9 years
"When this creature enters, you get ."
."
Riparian Tiger87%
$0.08↑#274000.00↓9.9 years
"Whenever this creature attacks, you may pay . If you do, it gets +2/+2 until end of turn."
. If you do, it gets +2/+2 until end of turn."+1 more matching line
Phyrexian Ironworks87%
$0.24↑#12856↑0.23↓2.2 years↓
"Whenever you attack, you get ."
."
Aether Theorist87%
$0.13↑#17053↑0.19↓9.9 years
"When this creature enters, you get ."
."
Shipwreck Moray87%
$0.08↑#253210.07↓9.6 years
"When this creature enters, you get ."
."
Aetherstream Leopard86%
$0.05#269390.12↓9.6 years
"Whenever this creature attacks, you may pay . If you do, it gets +2/+0 until end of turn."
. If you do, it gets +2/+0 until end of turn."+1 more matching line
Scrapper Champion86%
$0.23↑#233070.16↓9.6 years
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Primal Prayers86%
$0.18↑#13160↑0.45↓2.2 years↓
"When this enchantment enters, you get ."
."
Consulate Surveillance86%
$0.24↑#13263↑0.29↓9.9 years
"When this enchantment enters, you get ."
."
Thriving Skyclaw85%
$0.12↑#210000.00↓2.2 years↓
"Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it."
. If you do, put a +1/+1 counter on it."+1 more matching line
Riddle Gate Gargoyle85%
$0.20↑#11367↑0.00↓2.2 years↓
"When this creature enters, you get ."
."