Cloud Nine, also known as Holic 2, is a 3D fantasy MMORPG developed by the Korean studio Mgame based on the conflicts between two nations; Primus Union who fights for loyalty and Ganav Libero who fights for freedom. As a direct sequel to the original Holic, Cloud Nine supports the same anime inspired graphic style and revolving class system. CloudNine features unique "Monster" systems such as Monster Transformation system, Monster Card Collection, and Monster Taming/Riding as well as introduces Class Revolve, and Seven Sign Combo, Dungeon Building system

Monsters in Cloud Nine provide players with monster cards which can be registered in a monster collection book. When players collect the various cards in the game, they get authorized to obtain various monster taming items from a certain shop. Tamed monsters will support players as a pet with extra attacks and special skills. Also, the Monster Card Collection system will be fun for anyone who loves to collect things.

Monster Transformation & PK (Player Kill) System
Cloud Nine provides a monster transformation system to players. Items that let players transform into monsters can be obtained by certain enemies. When a player transforms into a monster, their status or power becomes exactly the same as the monsters, so it will give more advantages to the player who transformed. Also, the transformation system can be used as tactics during the battle in PVP.

Pet System
Cloud Nine pets fight alongside players on the battle field and depending on their item setting they can use unique skills. Pets that have been named by their master will obey and level up like players during battle. When a pet reaches a certain level they evolve to the next stage and their appearance upgrades and they get stronger. There are various types of pets such as Animal type, Human type, Beast type, Prankster type, Monster type, and Special type.

Crafting System
In Cloud Nine, various materials will be obtained from looting monsters, mining, fishing, and gathering. All the materials can be used to craft various special items. There are three different types of unique crafting: gem crafting, metal crafting, and medicine crafting.

Crafting Type & Description
-Gem Crafting: Start crafting gems that can be used to strengthen your weapons or armor.

-Medicine Crafting: Craft various consumable items such as potions, buff items, etc.

-Metal Crafting: Craft accessories such as necklaces, earrings, and rings that will provide extra options.

Mounts - Monster Riding
There are many kinds of mounts in Cloud Nine: Unicorn, Dragon, Cat, Wolf and Bouncy Horse, Etc. Choose what you like and these mounts can be used as transportation, also they will absorb some of the damage that players receive from enemies and increase the possibility of surviving in battle.

Class Switch - Class Revolving
In Cloud Nine, a character may choose another class which is called their sub-class. There is no penalty for having two classes and players can switch between their chosen classes to fit the situation. Also, sub-class skills will affect the main class skill tree and main and sub classes later share certain skills. Unlike its predecessor, in which players could change their sub-class, Cloud Nine players may only select their sub-class once.

Another Transportation - Human Cannon
Cloud Nine uses Human Cannons for long distance transportation. Hopping into the cannon will shoot players to where ever they want to go! Don’t worry about landing, characters are stronger than steel!

Nation War and PvP Fields
Players will constantly have war with the enemy faction in War zone, regular fields and dungeons to protect their faith. Enemy players will be shown on the screen with the red name. Don't hesitate to attack them or else you will be dead in the blink of an eye.