Halloween Event
1 Nordling Boss
25k gold to this NPC, then take next quest
Go for a quest to this npc
go one more trip between both of these npc to unlock portal
Prepeare 5 crystals and talk to this npc to unlock boss
Event Guides
25k gold to this NPC, then take next quest
Go for a quest to this npc
go one more trip between both of these npc to unlock portal
Prepeare 5 crystals and talk to this npc to unlock boss
AOHO Revival - Wiki 