Make sure you go to Tarif first to talk to Ahon BEFORE going to Heidel for the grave or you will be going back and forth twice like I did and it is very frustrating.

The amount of back-and-forth in this chain is a bit ridiculous...

Prerequisite for the quest : Highland Junction =>Node Manager=> Theo Dango do some quests in order to unlock: "Ghost of The Past".

Ahon Kirus NPC ACTUAL
PURPOSE:
1)AMITY GAME COMBOS
2)Has tabs next to comments for Quests, Stealable Items, Knowledge, Item Exchange List, Exchange for Energy & Accepts Gifts
Ahon Kirus KNOWLEDGE
PURPOSE:
1) INCASE AMITY GAME FAIL'S: OPTIMIZED STRATEGIES
2) NOTABLE KNOWLEDGE