Electrostatic Infantry 
Creature — Dwarf Wizard
$0.34 #6533 0.07 4.1 years
Trample
Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature.
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Cards similar to Electrostatic Infantry expected a card that isn't here?
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Pyre Hound100%
$0.07↓#19339↓0.19↑10.5 years↑
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
+1 more matching line
Aven Wind Mage93%
$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."
Fire Urchin93%
$0.05↓#25748↓0.008.0 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn."
+1 more matching line
Wee Dragonauts93%
$0.06↓#18706↓0.28↑20.8 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Festival Crasher93%
$0.18↓#20255↓0.005.1 years
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Mercurial Geists92%
$0.03↓#26102↓0.0610.2 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Kiln Fiend92%
$0.11↓#17248↓0.0616.5 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Quandrix Pledgemage92%
$0.17↓#21878↓0.005.5 years↑
"Whenever you cast or copy an instant or sorcery spell, put a +1/+1 counter on this creature."
Erratic Cyclops90%
$0.15↓#18693↓0.19↑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."
+1 more matching line
Tackle Artist89%
$0.18↓#18749↓0.060.5 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. If five or more mana was spent to cast that spell, put two +1/+1 counters on this creature instead."
+1 more matching line
Caldera Pyremaw88%
$0.68↑#4377↑0.56↑1.5 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. Then this creature deals damage equal to its power to target opponent."
Ghitu Amplifier88%
$0.12↓#25814↓0.004.1 years
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Karok Wrangler88%
$0.16↓#20928↓0.135.5 years↑
"Whenever you cast or copy an instant or sorcery spell, put a +1/+1 counter on target creature you control."
Aberrant Manawurm88%
$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."
+1 more matching line
Blistercoil Weird87%
$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."
Charmbreaker Devils86%
$0.17↓#75550.1115.1 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +4/+0 until end of turn."
Nivix Cyclops86%
$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."
Lecturing Scornmage86%
$0.17↓#18169↓0.090.5 years↓
"Whenever you cast an instant or sorcery spell that targets a creature, put a +1/+1 counter on this creature."
Spectacular Skywhale86%
$0.16↓#19016↓0.040.5 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn. If five or more mana was spent to cast that spell, put three +1/+1 counters on this creature instead."
Chandra's Emberling86%
$0.17↓#25096↓0.100.0 years↓
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."