Emissary of Grudges 

Creature — Efreet
$0.37 #19482 0.41 8.2 years
Flying, haste
As this creature enters, secretly choose an opponent.
Reveal the player you chose: Choose new targets for target spell or ability if it's controlled by the chosen player and if it targets you or a permanent you control. Activate only once.
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Cards similar to Emissary of Grudges 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.
Stalking Leonin95%
$0.27↓#9797↑0.28↓9.2 years
"When this creature enters, secretly choose an opponent."
+1 more matching line
Guardian Archon82%
$0.23↓#23926↓0.21↓5.5 years↓
"As this creature enters, secretly choose an opponent."
+1 more matching line
Deflecting Swat75%
$71.76↑#74↑1.73↑6.5 years↓
"You may choose new targets for target spell or ability."
Silver Wyvern74%
$0.99↑#31185↓0.26↓28.6 years↑
"
: Change the target of target spell or ability that targets only this creature. The new target must be a creature."
+1 more matching line
Menacing Ogre73%
$0.21↓#27424↓0.18↓24.0 years↑
"When this creature enters, each player secretly chooses a number. Then those numbers are revealed. Each player with the highest number loses that much life. If you are one of those players, put two +1/+1 counters on this creature."
Mizzium Meddler72%
$0.14↓#186520.13↓11.3 years↑
"When this creature enters, you may change a target of target spell or ability to this creature."
Reflecting Mirror72%
$1.03↑#29572↓0.12↓32.2 years↑
"
,
: Change the target of target spell with a single target if that target is you. The new target must be a player. X is twice the mana value of that spell."
Wyll's Reversal70%
$3.50↑#2911↑0.23↓4.4 years↓
"You may choose new targets for that spell or ability."
Rebound70%
$0.20↓#27890↓0.27↓28.6 years↑
"Change the target of target spell that targets only a player. The new target must be a player."