Lucky Clover 
Artifact
Whenever you cast an Adventure instant or sorcery spell, copy it. You may choose new targets for the copy.
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Cards that do something similar 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.
Chandra, Hope's Beacon 89%
$2.62#4076
"Whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy. This ability triggers only once each turn."
Thousand-Year Storm 89%
$1.37#1394
"Whenever you cast an instant or sorcery spell, copy it for each other instant and sorcery spell you've cast before it this turn. You may choose new targets for the copies."
Double Vision 89%
$0.60#2668
"Whenever you cast your first instant or sorcery spell each turn, copy that spell. You may choose new targets for the copy."
Galvanic Iteration 88%
$0.26#2918
"When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy."
Pigment Wrangler // Striking Palette 88%
$0.10#18650
"When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy."
Doublecast 88%
$0.21#11121
"When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy."
Howl of the Horde 88%
$0.24#13504
"When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy."
Teach by Example 88%
$0.12#7586
"When you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy."
Sevinne, the Chronoclasm 88%
#19831
"Whenever you cast your first instant or sorcery spell from your graveyard each turn, copy that spell. You may choose new targets for the copy."
Swarm Intelligence 88%
$0.39#4549
"Whenever you cast an instant or sorcery spell, you may copy that spell. You may choose new targets for the copy."
Show of Confidence 88%
$0.19#10015
"When you cast this spell, copy it for each other instant and sorcery spell you've cast this turn. You may choose new targets for the copies."
Melek, Izzet Paragon 87%
$0.13#7208
"Whenever you cast an instant or sorcery spell from your library, copy it. You may choose new targets for the copy."
Djinn Illuminatus 87%
$0.32#17031
"Each instant and sorcery spell you cast has replicate. The replicate cost is equal to its mana cost."
Jin-Gitaxias, Progress Tyrant 86%
$9.58#1699
"Whenever you cast an artifact, instant, or sorcery spell, copy that spell. You may choose new targets for the copy. This ability triggers only once each turn."
Hive Mind 86%
$9.85#7651
"Whenever a player casts an instant or sorcery spell, each other player copies that spell. Each of those players may choose new targets for their copy."
Unbound Flourishing 86%
$2.17#2696
"Whenever you cast an instant or sorcery spell or activate an ability, if that spell's mana cost or that ability's activation cost contains {X}, copy that spell or ability. You may choose new targets for the copy."
Bill Potts 85%
$0.18#22529
"Whenever you cast an instant or sorcery spell that targets only this card or activate an ability that targets only this card, copy that spell or ability. You may choose new targets for the copy. This ability triggers only once each turn."
Invasion of Arcavios // Invocation of the Founders 84%
$0.31#10248
"Whenever you cast an instant or sorcery spell from your hand, you may copy that spell. You may choose new targets for the copy."
Pyromancer Ascension 84%
$0.28#11771
"Whenever you cast an instant or sorcery spell while this enchantment has two or more quest counters on it, you may copy that spell. You may choose new targets for the copy."
Complete the Circuit 83%
$0.35#9059
"When you next cast an instant or sorcery spell this turn, copy that spell twice. You may choose new targets for the copies."