Taigam, Ojutai Master {2}{W}{U}
Legendary Creature — Human Monk
Instant, sorcery, and Dragon spells you control can't be countered.
Whenever you cast an instant or sorcery spell from your hand, if Taigam attacked this turn, that spell gains rebound. (Exile the spell as it resolves. At the beginning of your next upkeep, you may cast that card from exile without paying its mana cost.)
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Cards that do something similar expected a card that isn't here?
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Zaffai and the Tempests 87%
$0.24#13709
"Once during each of your turns, you may cast an instant or sorcery spell from your hand without paying its mana cost."
Baral and Kari Zev 87%
$0.24#6953
"Whenever you cast your first instant or sorcery spell each turn, you may cast a spell with lesser mana value that shares a card type with it from your hand without paying its mana cost. If you don't, create First Mate Ragavan, a legendary 2/1 red Monkey Pirate creature token. It gains haste until end of turn."
Overmaster 87%
$2.99#3095
"The next instant or sorcery spell you cast this turn can't be countered."
Suffocation 87%
$0.15#31137
"Cast this spell only if you were dealt damage this turn by a red instant or sorcery spell."
Lier, Disciple of the Drowned 87%
$0.43#2209
"Each instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost."
Past in Flames 86%
$4.21#1265
"Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost."
Invasion of Arcavios // Invocation of the Founders 85%
$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."
Thousand-Year Storm 85%
$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."
Iroh, Grand Lotus 84%
$0.43#6379
"During your turn, each non-Lesson instant and sorcery card in your graveyard has flashback. The flashback cost is equal to that card's mana cost."
Galvanic Iteration 84%
$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 84%
$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 84%
$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 84%
$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 84%
$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."
Academy Wall 84%
$0.27#13132
"Whenever you cast an instant or sorcery spell, you may draw a card. If you do, discard a card. This ability triggers only once each turn."
Veyran, Voice of Duality 84%
$1.36#790
"If you casting or copying an instant or sorcery spell causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time."
Return the Past 84%
$0.35#9123
"During your turn, each instant and sorcery card in your graveyard has flashback. Its flashback cost is equal to its mana cost."
Mizzix of the Izmagnus 83%
$0.80#6271
"Whenever you cast an instant or sorcery spell with mana value greater than the number of experience counters you have, you get an experience counter."
Quandrix, the Proof 83%
$1.65#8449
"Instant and sorcery spells you cast from your hand have cascade."