Guttersnipe 
Creature — Goblin Shaman
$0.22 #404 0.43 13.9 years
Whenever you cast an instant or sorcery spell, this creature deals 2 damage to each opponent.
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Cards similar to Guttersnipe expected a card that isn't here?
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Erebor Flamesmith100%
$0.49↑#2409↓0.19↓3.2 years↓
"Whenever you cast an instant or sorcery spell, this creature deals 1 damage to each opponent."
Electrostatic Field100%
$0.96↑#1587↓0.28↓7.9 years↓
"Whenever you cast an instant or sorcery spell, this creature deals 1 damage to each opponent."
Fiery Inscription96%
$0.66↑#1139↓0.363.2 years↓
"Whenever you cast an instant or sorcery spell, this enchantment deals 2 damage to each opponent."
Exalted Flamer of Tzeentch92%
$19.87↑#3185↓0.413.9 years↓
"Whenever you cast an instant or sorcery spell, this creature deals 1 damage to each opponent."
Thunderdrum Soloist90%
$0.26↑#10648↓0.00↓0.4 years↓
"Whenever you cast an instant or sorcery spell, this creature deals 1 damage to each opponent. If five or more mana was spent to cast that spell, this creature deals 3 damage to each opponent instead."
Weaver of Lightning86%
$0.09↓#20557↓0.07↓10.1 years↓
"Whenever you cast an instant or sorcery spell, this creature deals 1 damage to target creature an opponent controls."
Firebrand Archer85%
$0.27↑#1125↓0.23↓9.1 years↓
"Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent."
Kessig Flamebreather85%
$3.31↑#1447↓0.20↓4.8 years↓
"Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent."
Devoted Duelist83%
$0.13↓#12067↓0.10↓1.4 years↓
"Whenever you cast your second spell each turn, this creature deals 1 damage to each opponent."
Enraged Flamecaster81%
$0.16↓#14671↓0.00↓0.6 years↓
"Whenever you cast a spell with mana value 4 or greater, this creature deals 2 damage to each opponent."
Fire Urchin81%
$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."
Festival Crasher81%
$0.17↓#19995↓0.22↓4.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Kiln Fiend81%
$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."
Unruly Catapult81%
$0.34↑#4263↓0.20↓3.0 years↓
"Whenever you cast an instant or sorcery spell, untap this creature."
Thermo-Alchemist81%
$0.16↓#1713↓0.22↓10.1 years↓
"Whenever you cast an instant or sorcery spell, untap this creature."
Aven Wind Mage80%
$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 Dragonauts80%
$0.05↓#18358↓0.29↓20.7 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Mercurial Geists80%
$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."
Caldera Pyremaw80%
$0.39↑#4521↓0.32↓1.4 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."
Black Waltz No. 380%
$0.31↑#3060↓0.351.2 years↓
"Whenever you cast a noncreature spell, this card deals 2 damage to each opponent."