User blog comment:Ymirok/Lorraic, the Archmage/@comment-26263213-20150429041922/@comment-6295009-20150430110424

The ult is like a mode. It has 3 interchangeable modes. When you press R while at the third shape, it begins again at the first shape. It has an infinite duration and a short cooldown. Also a tiny mana cost... and it's available at level 1, like Nidalee or Jayce's ultimates.