The entrance to the Haunted Mansion is located in the town of Byako. All RAIDS require you and any party member to be level 255.
It is advised to enter these RAID maps with a party due to the powerful mobs. There are mobs deal high damage. Be aware there are 4 maps in this raid. First is a small map with Evil Druids. You are outside of the haunted mansion and you need to find a way inside.. The second map is the first floor for the mansion find the spirits and activate them in the correct sequence.. This map contains the power MVP Nidhoggur's Shadow. You will want to kill this mob it drops important ingredients for summoning RAID Bosses. You proceed to the next floor. This floor looks identical... Repeat the same process but the sequence is different..
You proceed into the abyss.....Naght Sieger will be protecting the trapped spirit....
You need to kill him and sequence the spirits in the correct order, and have ingredients on hand to summon...Abyss Arthur...
Most RAID maps require a specific sequence order to move further into the map and/or in order to summon the RAID bosses. It is recommended that you gather a party containing at least 1 TANK, 1 HEALER, 2 DPS, but this recommendation is not exactly required. Search for Spirits and engage them in the correct order to proceed. To summon RAID boss you will need to apply the same method but the sequence may not be the same!
The required items to summon all RAID bosses are as follows :
7562 ( Ice Scale ) x1
7451 ( Fire Dragon Scale ) x1
7294 ( Turquoise ) x1
6091 ( Dark Red Scale ) x1
1250039 ( Poison Fourth Stone ) x1
1250038 ( Wind Fourth Stone ) x1
1250037 ( Ice Fourth Stone ) x1
1250036 ( Flame Fourth Stone ) x1