Kiln Fiend 
Creature — Elemental Beast
$0.11 #17248 0.06 16.5 years
Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn.
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Festival Crasher100%
$0.18↑#202550.005.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Fire Urchin100%
$0.05↓#25748↓0.008.0 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn."
Mercurial Geists100%
$0.03↓#26102↓0.0610.2 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Wee Dragonauts100%
$0.06↓#187060.28↑20.8 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Aven Wind Mage100%
$0.11#23341↓0.33↑8.3 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Ghitu Amplifier95%
$0.12↑#25814↓0.004.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Erratic Cyclops95%
$0.15↑#186930.19↑8.0 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."
Charmbreaker Devils94%
$0.17↑#7555↑0.1115.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +4/+0 until end of turn."
Aberrant Manawurm94%
$0.16↑#23171↓0.050.5 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."
Blistercoil Weird94%
$0.25↑#22941↓0.0714.0 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. Untap it."
Storm Skreelix92%
$0.20↑#185370.075.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Spellrune Painter // Spellrune Howler92%
$0.14↑#20915↓0.005.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+2 until end of turn."
Pyre Hound92%
$0.07↓#193390.19↑10.5 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Electrostatic Infantry92%
$0.34↑#6533↑0.074.1 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Nivix Cyclops92%
$0.11#22581↓0.0613.5 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."
Frolicking Familiar // Blow Off Steam91%
$0.31↑#8567↑0.113.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Clever Lumimancer90%
$0.18↑#196890.21↑5.5 years↓
"Whenever you cast or copy an instant or sorcery spell, this creature gets +2/+2 until end of turn."
Lorehold Pledgemage90%
$0.17↑#27955↓0.005.5 years↓
"Whenever you cast or copy an instant or sorcery spell, this creature gets +1/+0 until end of turn."
Umara Mystic90%
$0.17↑#20771↓0.006.1 years↓
"Whenever you cast an instant, sorcery, or Wizard spell, this creature gets +2/+0 until end of turn."
Fluxcharger88%
$0.15↑#28428↓0.0013.5 years↓
"Whenever you cast an instant or sorcery spell, you may switch this creature's power and toughness until end of turn."