The video above is the The Witcher 3 Wild Hunt On Thin Ice Main Quest Walkthrough and shows how to complete On Thin Ice, the quest featured in The Witcher III: Wild Hunt.
The video walkthrough covers the following objectives:
Join Avallac’h and the sorceresses on Undvik.
Defeat Caranthir.
Kill Caranthir.
Swim to the surface.
Board the Naglfar.
Kill Eredin.
