Act 1 however, consists of the player attempting to reach Act2 where they obtain Dynamite and the quest is unlocked only after this. The expansion of the quest takes place on the in-game lore which is about the three Witch Gods of Cairn.
The Hidden Path is an extension of a side quest that takes place in all four acts of Grim Dawn. If you are someone with such confusion this article is for you and it gives a detailed explanation of the Grim Dawn Hidden Path quests.
The Grim Dawn marked stone is an essential part of the quest and one might often wonder about its significance and have several questions regarding how they can obtain it and what are the different objectives of the quest.