Erratic Cyclops 
Creature — Cyclops Shaman
$0.15 #18347 0.50 7.9 years
Trample
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.
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Fire Urchin94%
$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."
+1 more matching line
Festival Crasher94%
$0.17↑#199950.22↓4.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Kiln Fiend94%
$0.10↓#169470.27↓16.4 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Aven Wind Mage94%
$0.08↓#23016↓0.31↓8.1 years
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Wee Dragonauts94%
$0.05↓#183580.29↓20.7 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Mercurial Geists94%
$0.04↓#25774↓0.25↓10.1 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Manaplasm89%
$0.18↑#163290.4017.9 years↑
"Whenever you cast a spell, this creature gets +X/+X until end of turn, where X is that spell's mana value."
Electrostatic Infantry88%
$0.35↑#6376↑0.28↓4.0 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
+1 more matching line
Pyre Hound88%
$0.07↓#189830.00↓10.4 years↑
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Fluxcharger88%
$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."
Renegade Bull88%
$0.19↑#14356↑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 that spell's mana value."
+1 more matching line
Aberrant Manawurm86%
$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."
Blistercoil Weird86%
$0.23↑#22603↓0.31↓13.9 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn. Untap it."
Ghitu Amplifier84%
$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."
Charmbreaker Devils82%
$0.17↑#7398↑0.18↓14.9 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +4/+0 until end of turn."
Nivix Cyclops82%
$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."
Spellrune Painter // Spellrune Howler81%
$0.15#206010.13↓4.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Kinetic Augur81%
$0.23↑#191140.20↓6.2 years↓
"Trample"
Rehearsed Debater80%
$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."
Frolicking Familiar // Blow Off Steam80%
$0.30↑#8235↑0.25↓3.0 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."