Thread:Ajraddatz/@comment-4960221-20121003235813/@comment-1990160-20121004024134

Hex core has a cost, just like... Philosopher's Stone into Eleisa's Miracle. So, Hex Core upgrades qualify as recipes (item + money), whereas the Head of Kha'Zix is just a visually/changed effect version of Bonetooth Necklace that did not require additional purchase.