Guild Wars 2

During the event Defeat the giant assaulting the Town of Nageling, the champ giant randomly loses aggro, regenerates to full health and goes back to the exact point where he stood before fighting him.

We tried to defeat him today with 3 people, fought on the main square of the town. He first left combat and healed back from ~90% health, then again from ~10%.

Confusing Cry with Illusionary Persona will not grant Retaliation if illusions are not summoned. Distortion, however, will properly give its effect (also called Distortion) without illusions.