Crescent decided to follow Hiccup and Viggo to the island Johan and Krogan were staying. After the explosion, You were able to save Viggo

He woke up with pain shooting through his body. With a loud groan, he tries to sit up. His eyes need some time to adjust to the light. He notices that he's lying in a bed...in a cabin? And bandages are covering his torso

Viggo: "Hello?"

He calls out weakly

Little did he know that he's lying in your bed, on Dragons Edge