Show of Confidence 
Instant
$0.18 #10211 0.07 5.4 years
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.
Put a +1/+1 counter on target creature. It gains vigilance until end of turn.
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Cards similar to Show of Confidence expected a card that isn't here?
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Thousand-Year Storm86%
$1.08↑#1409↑0.64↑7.9 years↑
"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."
Expanded Anatomy81%
$0.24↑#12855↓0.065.4 years
"Put two +1/+1 counters on target creature. It gains vigilance until end of turn."
Astral Steel76%
$0.10↓#18290↓0.1223.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
+1 more matching line
Homestead Courage76%
$0.17↓#16934↓0.42↑4.9 years
"Put a +1/+1 counter on target creature you control. It gains vigilance until end of turn."
Dig Site Inventory76%
$0.19↑#16882↓0.000.4 years↓
"Put a +1/+1 counter on target creature you control. It gains vigilance until end of turn."
Ground Rift73%
$0.16↓#16074↓0.29↑19.9 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
Weather the Storm72%
$1.23↑#90410.39↑7.2 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn."
Lock and Load72%
$0.70↑#6077↑0.18↑2.4 years↓
"Draw a card, then draw a card for each other instant and sorcery spell you've cast this turn."
Reaping the Graves72%
$0.37↑#17138↓0.18↑23.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
Brain Freeze72%
$1.89↑#784↑1.02↑23.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
Tendrils of Agony72%
$0.22↑#5584↑0.50↑23.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
Empty the Warrens72%
$0.16↓#2500↑0.29↑19.9 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn."
Chatterstorm72%
$0.28↑#2825↑0.35↑5.2 years
"Storm When you cast this spell, copy it for each spell cast before it this turn."
Hunting Pack72%
$0.08↓#14663↓0.1023.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn."
Scattershot71%
$0.36↑#17075↓0.25↑23.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
Swarm Intelligence70%
$0.36↑#4702↑0.37↑9.1 years↑
"Whenever you cast an instant or sorcery spell, you may copy that spell. You may choose new targets for the copy."
Double Vision70%
$0.60↑#2730↑0.43↑6.2 years
"Whenever you cast your first instant or sorcery spell each turn, copy that spell. You may choose new targets for the copy."
Vastwood Fortification // Vastwood Thicket70%
$0.22↑#6260↑0.095.9 years
"Put a +1/+1 counter on target creature."
Hindering Touch70%
$0.09↓#22698↓0.29↑23.3 years↑
"Storm When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies."
Additive Evolution70%
$0.18#15173↓0.000.4 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. It gains vigilance until end of turn."