Similar to what Nepycros said, given a Leaf Dragon (of all creatures, really) and a huge surplus of
, one could basically make their entire army immune to damaging CC effects, which is a cause for concern. The funny thing is if each creature that had 0 or less health triggered the Fountain/Well of Life, wouldn't this also cause Mitosis + Spark/Ball Lightning to be one of the most quanta-efficient (unless the Spark was delayed/frozen or rewound, but adrenaline counters the first two) combos?
I sort of like the permanent, but it feels a bit off to me... giving the permanent a 'self-destroy' option wouldn't make any sense in my opinion, as it's a fountain. Thematically, it can't destroy itself unless the water purposely clogged to stop the fountain from working or something... ^^;