Yeah, my bad I meant that it would make nymph tears obsolete because you can just use the potion to make a nymph instead of turning pillars into them.
But to the point, there's a reason nymph's ability for their respective potions are usually more expensive (either by having to use a pillar/tower or being lucky to win them) than the pot... it's because you essentially have a lot of copies without having to fill the card slots. Most of the nymph's abilitis are very powerful and being able to get a rage pot for less without having a nymph or the tears to get it means you are bypassing the restrictions in place to keep the abilities in balance.
Also, having a Fire Storm on a creature is waaaay OP. Imagine TU on one? That to would be way OP.