Blistercoil Weird 
Creature — Weird
$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.
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Unruly Catapult94%
$0.34↑#4263↑0.20↓3.0 years↓
"Whenever you cast an instant or sorcery spell, untap this creature."
Thermo-Alchemist94%
$0.16↓#1713↑0.2210.1 years↓
"Whenever you cast an instant or sorcery spell, untap this creature."
Gelectrode94%
$0.53↑#9047↑0.05↓20.6 years↑
"Whenever you cast an instant or sorcery spell, you may untap this creature."
Kiln Fiend93%
$0.10↓#16947↑0.2716.4 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Festival Crasher93%
$0.17↓#199950.224.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Fire Urchin93%
$0.07↓#254470.62↑7.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn."
Mercurial Geists92%
$0.04↓#257740.2510.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +3/+0 until end of turn."
Wee Dragonauts92%
$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 Mage92%
$0.08↓#230160.318.1 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Erratic Cyclops86%
$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."
Leonin Battlemage86%
$0.19↓#259410.3822.6 years↑
"Whenever you cast a spell, you may untap this creature."
Pyre Hound85%
$0.07↓#189830.00↓10.4 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Electrostatic Infantry85%
$0.35↑#6376↑0.284.0 years↓
"Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature."
Fluxcharger85%
$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."
Aberrant Manawurm84%
$0.11↓#233560.00↓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."
Ghitu Amplifier82%
$0.08↓#254630.00↓4.0 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn."
Nivix Cyclops82%
$0.08↓#222320.62↑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 Devils81%
$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."
Spellrune Painter // Spellrune Howler80%
$0.15↓#206010.13↓4.9 years↓
"Whenever you cast an instant or sorcery spell, this creature gets +1/+1 until end of turn."
Rehearsed Debater79%
$0.03↓#246540.00↓0.4 years↓
"Whenever you cast an instant or sorcery spell that targets a creature, this creature gets +1/+1 until end of turn."