Flamekin Herald 
Creature — Elemental Wizard
$0.36 #8263 0.38 5.9 years
Commander spells you cast have cascade. (Whenever you cast a commander, exile cards from the top of your library until you exile a nonland card with lesser mana value. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
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Cards similar to Flamekin Herald expected a card that isn't here?
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Maelstrom Nexus89%
$1.94↑#4917↑0.80↑17.5 years↑
"The first spell you cast each turn has cascade."
Wild-Magic Sorcerer79%
$5.64↑#1654↑0.385.2 years
"The first spell you cast from exile each turn has cascade."
The First Sliver78%
$27.78↑#4268↑1.71↑7.4 years↑
"Sliver spells you cast have cascade."
Wildsear, Scouring Maw78%
$0.52↑#3735↑0.402.2 years↓
"Enchantment spells you cast from your hand have cascade."
Yidris, Maelstrom Wielder76%
$8.56↑#91961.00↑9.9 years↑
"Whenever this card deals combat damage to a player, as you cast spells from your hand this turn, they gain cascade."
Imoti, Celebrant of Bounty76%
$0.31↓#2611↑0.55↑5.9 years
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Zhulodok, Void Gorger73%
$17.12↑#2834↑1.61↑3.2 years↓
"Colorless spells you cast from your hand with mana value 7 or greater have "Cascade, cascade.""
Quandrix, the Proof73%
$1.26↑#70280.63↑0.5 years↓
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Dark Apostle70%
$0.39↑#12169↓0.06↓4.0 years↓
"
, 
: The next noncreature spell you cast this turn has cascade."
, : The next noncreature spell you cast this turn has cascade."
Enlisted Wurm70%
$0.12↓#19144↓0.4417.5 years↑
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Bloodbraid Elf70%
$0.15↓#4960↑0.18↓17.5 years↑
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Shardless Agent70%
$0.32↓#74650.00↓14.4 years↑
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Annoyed Altisaur70%
$0.15↓#3984↑0.09↓5.9 years
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Maelstrom Colossus70%
$0.41↑#4540↑0.03↓5.9 years
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."
Boarding Party70%
$0.21↓#78660.22↓5.9 years
"Cascade When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order."