Ertha Jo, Frontier Mentor 
Legendary Creature — Kor Advisor
$0.23 #8332 0.06 2.5 years
When Ertha Jo enters, create a 1/1 red Mercenary creature token with "
: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."
: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."Whenever you activate an ability that targets a creature or player, copy that ability. You may choose new targets for the copy.
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Cards similar to Ertha Jo, Frontier Mentor 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.
Illusionist's Bracers90%
$4.22↑#1648↑0.35↑13.7 years↑
"Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy."
Echo, Perceptive Prodigy86%
$0.24↑#11000↓0.38↑0.3 years↓
"
, : Copy target activated or triggered ability you control from a creature source. You may choose new targets for the copy."
, : Copy target activated or triggered ability you control from a creature source. You may choose new targets for the copy."
Rings of Brighthearth86%
$6.40↑#1417↑0.66↑19.0 years↑
"Whenever you activate an ability, if it isn't a mana ability, you may pay . If you do, copy that ability. You may choose new targets for the copy."
. If you do, copy that ability. You may choose new targets for the copy."
Strionic Resonator84%
$5.81↑#604↑0.56↑13.3 years↑
", : Copy target triggered ability you control. You may choose new targets for the copy."
, : Copy target triggered ability you control. You may choose new targets for the copy."
Gogo, Master of Mimicry84%
$4.47↑#3350↑0.61↑1.4 years↓
"
, : Copy target activated or triggered ability you control X times. You may choose new targets for the copies. This ability can't be copied and X can't be 0."
, : Copy target activated or triggered ability you control X times. You may choose new targets for the copies. This ability can't be copied and X can't be 0."
Prickly Pair83%
$0.09↓#16306↓0.002.5 years
"When this creature enters, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery.""
: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery.""
Battlemage's Bracers80%
$3.17↑#5636↑0.135.5 years↑
"Whenever an ability of equipped creature is activated, if it isn't a mana ability, you may pay . If you do, copy that ability. You may choose new targets for the copy."
. If you do, copy that ability. You may choose new targets for the copy."
Kurkesh, Onakke Ancient78%
$0.28↑#18192↓0.0012.3 years↑
"Whenever you activate an ability of an artifact, if it isn't a mana ability, you may pay . If you do, copy that ability. You may choose new targets for the copy."
. If you do, copy that ability. You may choose new targets for the copy."
The Enigma Jewel // Locus of Enlightenment78%
$1.25↑#6504↑0.062.9 years
"Whenever you activate an ability that isn't a mana ability, copy it. You may choose new targets for the copy."
Tawnos, Urza's Apprentice76%
$0.40↑#17081↓0.28↑8.2 years↑
"
, : Copy target activated or triggered ability you control from an artifact source. You may choose new targets for the copy."
, : Copy target activated or triggered ability you control from an artifact source. You may choose new targets for the copy."
Abstruse Archaic76%
$2.60↑#5625↑0.28↑3.2 years
", : Copy target activated or triggered ability you control from a colorless source. You may choose new targets for the copy."
, : Copy target activated or triggered ability you control from a colorless source. You may choose new targets for the copy."
Virtue of Knowledge // Vantress Visions76%
$5.14↑#2285↑0.42↑3.1 years
"Copy target activated or triggered ability you control. You may choose new targets for the copy."
Agrus Kos, Eternal Soldier75%
$1.65↑#12449↓0.113.9 years↑
"Whenever this card becomes the target of an ability that targets only it, you may pay 
. If you do, copy that ability for each other creature you control that ability could target. Each copy targets a different one of those creatures."
. If you do, copy that ability for each other creature you control that ability could target. Each copy targets a different one of those creatures."
Mirror-Shield Hoplite74%
$0.13↓#24334↓0.143.5 years
"Whenever a creature you control becomes the target of a backup ability, copy that ability. You may choose new targets for the copy. This ability triggers only once each turn."
Ambassador Oak73%
$0.06↓#24010↓0.0018.7 years↑
"When this creature enters, create a 1/1 green Elf Warrior creature token."
Elderleaf Mentor73%
$0.10↓#18586↓0.065.7 years↑
"When this creature enters, create a 1/1 green Elf Warrior creature token."
Protector of Gondor73%
$0.15↓#18778↓0.073.3 years
"When this creature enters, create a 1/1 white Human Soldier creature token."
Daysquad Marshal73%
$0.14↓#24006↓0.006.5 years↑
"When this creature enters, create a 1/1 white Human Soldier creature token."
Resolute Reinforcements73%
$0.11↓#71530.004.1 years↑
"When this creature enters, create a 1/1 white Soldier creature token."
Attended Knight73%
$0.09↓#18788↓0.0014.3 years↑
"When this creature enters, create a 1/1 white Soldier creature token."