Song of Sadness
Level 8 enchantment
Cast time 10 min, touch, V,S,M appropriate gem and platinum dust, worth 200gp total, consumed
This spell creates the magic item, Elemental Gem. In order to do so, you must first have one of the four appropriate elementals, CR=5. This elemental is most likely conjured via another spell, but could in theory also be an untamed one.
Upon completion, an elemental gem is created.