Kiln Fiend 
Creature — Elemental Beast
$0.10 #16947 0.27 16.4 years
Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn.
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Festival Crasher100%
$0.17↑#199950.224.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Fire Urchin100%
$0.07↓#25447↓0.62↑7.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn."
Mercurial Geists100%
$0.04↓#25774↓0.2510.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Wee Dragonauts100%
$0.05↓#183580.2920.7 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Aven Wind Mage100%
$0.08↓#23016↓0.318.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Erratic Cyclops94%
$0.15↑#183470.50↑7.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +X/+0 until end of turn, where X is that spell's mana value."
Blistercoil Weird93%
$0.23↑#22603↓0.3113.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. Untap it."
Aberrant Manawurm92%
$0.11↑#23356↓0.00↓0.4 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +X/+0 until end of turn, where X is the amount of mana spent to cast that spell."
Fluxcharger92%
$0.10#28164↓0.06↓13.3 years↓
"Whenever you cast an instant or sorcery spell, you may switch this creature's power and toughness until end of turn."
Pyre Hound92%
$0.07↓#189830.00↓10.4 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Electrostatic Infantry92%
$0.35↑#6376↑0.284.0 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Ghitu Amplifier91%
$0.08↓#25463↓0.00↓4.0 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Nivix Cyclops90%
$0.08↓#22232↓0.62↑13.3 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn and can attack this turn as though it didn't have defender."
Charmbreaker Devils90%
$0.17↑#7398↑0.1814.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +4/+0 until end of turn."
Rehearsed Debater88%
$0.03↓#24654↓0.00↓0.4 years↓
"Whenever you cast an instant or sorcery spell that targets a creature, this creature gets +1/+1 until end of turn."
Spellrune Painter // Spellrune Howler88%
$0.15↑#20601↓0.13↓4.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+2 until end of turn."
Umara Mystic88%
$0.15↑#20341↓0.06↓5.9 years↓
"Whenever you cast an instant, sorcery, or Wizard spell, this creature gets +2/+0 until end of turn."
Frolicking Familiar // Blow Off Steam86%
$0.30↑#8235↑0.253.0 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Storm Skreelix85%
$0.17↑#181050.184.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Unruly Catapult84%
$0.34↑#4263↑0.203.0 years↓
"Whenever you cast an instant or sorcery spell, untap this creature."