What episode does layla get her enchantix in winx club?

Musa Earns her Enchantix on the Episode "Attack of the Zobie witches." This is a summary of the episode:

Valtor conquers Cloudtower, brings the student witches under his control, and forces them to attack Alfea after he imprisons Professor Griffin. All the fairies, including Mirta, fight the witches while Valtor goes into battle with Ms. Faragonda. Meanwhile, Musa earns her Enchantix after trying to save Princess Galatea from a fire started by Darcy in the Alfea library