Blood Castle
Help the Archangel, one of the strongest warriors on the continent of Devilz, he has secretly guarded the lands he has sworn to protect. As Kundun presence approaches, the Archangel has been fighting the monsters trying to advance on the continent, but unfortunately our Archangel Guardian cannot defend himself forever.
Requirements
You need the Cloak of Invisibility that will match the Blood Castle level you enter.
Creating a Cloak of Invisibility
You will need to create the Cloak of Invisibility using the 1x Scroll of Archangel, the 1x Blood Bone, and 1x Jewel of Chaos. Only items of the same level can be combined to create the Cloak of Invisibility for that specific Blood Castle.
Step 01
After getting the ingredients go to the city of Noria or someone else with the Chaos Machine:

In Chaos Machine talk to the Goblin positioned in front of the machine, when talking to him will appear three options, Regular Combination, Chaos Weapon Combination and Item Combination Option. Choose the first Regular Combination option.
Step 02
After placing the ingredients in the machine click Combine and OK, the machine will create its wing depending on the success rate. In the event of a failure, the machine will consume all of its items.
An amount of Zen is charged for the creation.
Congratulations! You created a Cloak of Invisibility.
Entering the event
After the event announcement begins, go to Messenger of Archangel and enter the castle according to your level and invitation:

Good luck! Wait for the event to begin.
About the event
Levels and Monsters
| BC LEVEL | MONSTERS |
|---|---|
| 1 (Character level 15~80) | Over Lv. 2 (Spider) |
| 2 (Character level 81~130) | Over Lv. 32 (Ghost) |
| 3 (Character level 131~180) | Over Lv. 45 (Vepar) |
| 4 (Character level 181~230) | Over Lv. 57 (Death Cow) |
| 5 (Character level 231~280) | Over Lv. 68 (Silver Valkyrie) |
| 6 (Character level 281~330) | Over Lv. 76 (Blood Wolf) |
| 7 (Character level 331~400) | Over Lv. 84 (Bream Knight) |
Event Rules
| RULES |
|---|
| Warping command will work in Blood Castle. |
| Only a maximum of 10 players are allowed per each Blood Castle level sub-server. |
| If you die in Blood Castle (you will not lose experience, lose Zen, or drop items). |
| Specific skills can be used in safety zone of Blood Castle (Attack/Defense buff, heal, soul barrier, swell life). |