Firewall

Firewall is a Winx/Enchantix defensive/offensive spell used by Tecna. She creates a lime green protective shield or a green round cage. In Welcome to Alfea, the shield blazes with powerful heat, staying true to the spell's name.

Series

 * Season 1 Episode 2 - Used to defend the Winx and herself.
 * The Fate of Bloom - Used to defend the Winx and herself.
 * Season 2 Episode 11 - Used against Digit.
 * The Secret of the Lost Kingdom - Used to defend Stella, Musa, and herself, but failed.

Books

 * Welcome to Alfea - Used to defend the Winx and herself.

Trivia

 * In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
 * This spell looks similar to Shield.
 * Bloom also has a spell called Fire Wall.
 * The front view of this spell in the Nickelodeon Special looks similar to the hand shield version of Super Prism.