Firemantle Mage 
Creature — Human Shaman Ally
$0.13 #17981 0.21 11.0 years
Rally — Whenever this creature or another Ally you control enters, creatures you control gain menace until end of turn. (A creature with menace can't be blocked except by two or more creatures.)
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Cards similar to Firemantle Mage 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.
Akoum Battlesinger88%
$0.21↑#169590.00↓16.7 years↑
"Whenever this creature or another Ally you control enters, you may have Ally creatures you control get +1/+0 until end of turn."
Tajuru Beastmaster85%
$0.06↓#23168↓0.05↓11.0 years
"Whenever this creature or another Ally you control enters, creatures you control get +1/+1 until end of turn."
Tajuru Warcaller85%
$0.22↑#150500.00↓11.0 years
"Whenever this creature or another Ally you control enters, creatures you control get +2/+2 until end of turn."
Seascape Aerialist84%
$0.33↑#154840.1217.0 years↑
"Whenever this creature or another Ally you control enters, you may have Ally creatures you control gain flying until end of turn."
Chasm Guide84%
$0.10↓#154250.00↓11.0 years
"Whenever this creature or another Ally you control enters, creatures you control gain haste until end of turn."
Makindi Patrol83%
$0.16↑#156030.1311.0 years
"Whenever this creature or another Ally you control enters, creatures you control gain vigilance until end of turn."
Ondu Champion82%
$0.11↓#157300.00↓11.0 years
"Whenever this creature or another Ally you control enters, creatures you control gain trample until end of turn."
Highland Berserker81%
$0.18↑#201180.07↓17.0 years↑
"Whenever this creature or another Ally you control enters, you may have Ally creatures you control gain first strike until end of turn."
Grovetender Druids81%
$0.05↓#26337↓0.00↓11.0 years
"Whenever this creature or another Ally you control enters, you may pay 
. If you do, create a 1/1 green Plant creature token."
. If you do, create a 1/1 green Plant creature token."
Avatar Enthusiasts81%
$0.15↑#8557↑0.180.9 years↓
"Whenever another Ally you control enters, put a +1/+1 counter on this creature."
Graypelt Hunter80%
$0.17↑#215680.00↓16.7 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Umara Raptor80%
$0.19↑#181640.06↓17.0 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Oran-Rief Survivalist80%
$0.22↑#180110.05↓17.0 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Tuktuk Grunts80%
$0.10↓#27718↓0.1817.0 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Kazandu Blademaster80%
$0.32↑#13588↑0.05↓17.0 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Hada Freeblade80%
$0.38↑#12252↑0.00↓16.7 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Nimana Sell-Sword80%
$0.09↓#29172↓0.00↓17.0 years↑
"Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature."
Appa, the Vigilant80%
$4.25↑#8530↑0.130.9 years↓
"Whenever this card or another Ally you control enters, creatures you control get +1/+1 and gain flying and vigilance until end of turn."
Lantern Scout80%
$0.33↑#10896↑0.07↓11.0 years
"Whenever this creature or another Ally you control enters, creatures you control gain lifelink until end of turn."
Earth King's Lieutenant80%
$0.32↑#7439↑0.160.9 years↓
"Whenever another Ally you control enters, put a +1/+1 counter on this creature."