Echo Storm {3}{U}{U}
Sorcery
When you cast this spell, copy it for each time you've cast your commander from the command zone this game. You may choose new targets for the copies.
Create a token that's a copy of target artifact.
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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.
Fury Storm 100%
$4.47#7420
"When you cast this spell, copy it for each time you've cast your commander from the command zone this game. You may choose new targets for the copies."
Hatut Zeraze Strike Force 99%
$0.74#21321
"When you cast this spell, copy it for each time you've cast your commander from the command zone this game."
Genesis Storm 99%
$0.68#13220
"When you cast this spell, copy it for each time you've cast your commander from the command zone this game."
Skull Storm 99%
$0.87#12613
"When you cast this spell, copy it for each time you've cast your commander from the command zone this game."
Empyrial Storm 99%
$0.41#18267
"When you cast this spell, copy it for each time you've cast your commander from the command zone this game."
Sage of the Skies 94%
$0.54#12695
"When you cast this spell, if you've cast another spell this turn, copy this spell."
Ancestral Communion 92%
$0.45#19493
"When you cast this spell while you control your commander, copy this spell. You may choose a new target for the copy."
Cosmic Crucible 90%
$0.36#18628
"Whenever you cast a noncreature spell, you may copy it. You may choose new targets for the copy. Do this only once each turn."
The Enigma Jewel // Locus of Enlightenment 90%
$1.20#6378
"Whenever you activate an ability that isn't a mana ability, copy it. You may choose new targets for the copy."
Spider-Verse 90%
$1.16#8465
"Whenever you cast a spell from anywhere other than your hand, you may copy it. If you do, you may choose new targets for the copy. If the copy is a permanent spell, it gains haste. Do this only once each turn."
Twinning Staff 90%
$20.59#1706
"If you would copy a spell one or more times, instead copy it that many times plus an additional time. You may choose new targets for the additional copy."
Storm of Saruman 89%
$3.01#3593
"Whenever you cast your second spell each turn, copy it, except the copy isn't legendary. You may choose new targets for the copy."
Spellweaver Helix 89%
$2.16#10908
"Whenever a player casts a card, if it has the same name as one of the cards exiled with this artifact, you may copy the other. If you do, you may cast the copy without paying its mana cost."
Tomb of Horrors Adventurer 88%
$0.36#5990
"Whenever you cast your second spell each turn, copy it. If you've completed a dungeon, copy that spell twice instead. You may choose new targets for the copies."
Osgood, Operation Double 88%
$0.26#12999
"When you cast this spell, create a token that's a copy of it, except it isn't legendary."