This may be too strong with voodoos.
It targets a random creature on the field. For that combo to work, you need to fill three conditions:
1. Your deck runs death or you run the upgraded version of Deathbloom
2. The field only contains a voodoo doll and Deathbloom (Which will be unlikely considering that strategy can be seen pretty easily and weakened when only one creature is summoned on the field.)
3. You have the cards on the field before the opponent gets the cards in his hands to break your strategy. Considering AI carry CC and the meta-game of Elements at this point is more than half the decks played in PvP having CC, that will be kind of hard.
Bottom line, that combo is hard to pull off, can be seen from a mile away, and can be stopped from a mile away.