Maybe make it use spell of target creature I wouldn't want to leave out blaze or growth
So growth creatures come to mind eh? Well there are two reasons why that wouldn't work:
1. Too slow with Spirits.
2. Golem rush decks couldn't fuel these very well, since it would come down to laying down a new golem or playing this, and it still would be too slow.
Not to mention this is vulnerable to anti-permanent cards AND requires any creatures be put out on the field.