Which mythological creature was central to Starbucks' highly successful 2017 limited-edition promotional campaign that drove a 13% increase in store traffic?

Throughout history, mythology and folklore have influenced product packaging, branding, and retail storytelling. From Medusa adorning Versace's logo to Nike being named after the Greek goddess of victory, ancient stories continue to shape modern consumer experiences. This trivia question explores how a particular mythological creature has been leveraged in a groundbreaking retail customer engagement strategy that resulted in measurable sales growth.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Unicorn (in their color-changing 'Unicorn Frappuccino')
Dragon (in their 'Dragon Scale Frappuccino')
Phoenix (in their 'Rising Phoenix Cold Brew')
Mermaid (in their 'Mermaid Tail Refresher')