I like this card a lot, and assuming Voodoo dolls don't take damage from it, it seems balanced. Another counter I didn't see mentioned is using it on your own big creatures to get around Gravity shield.
By itself the card doesn't do too much, but when combined with one or more card from many different elements it becomes a great counter or combo.
Thunderstorm
Fire shield
Plague/Retrovirus, Skull shield
Big creatures, Gravity shield, Catapult (enemy creatures), Otyugh
Sparks! (lol)
Scarabs
Angels
Probably even more.