Underworld

Underworld is the multiplayer mode of Shadow Fight 2. It features online raid-style battles which allow players to team up together with other players to tackle the bosses. The bosses, called the Eternals, are powerful beings that have lived for thousands of years and they started to aim to destroy the world after the Gates of Shadows are opened. Playing Underworld is completely optional, players can enter it anytime after they defeat Dandy, Lynx's fifth bodyguard. After defeating Titan, Shadow ends up in the Underworld.

Username
Players can enter the Underworld by tapping the icon on the bottom right of the map. The first time a player enters, they need to enter their username, with minimum 3 letters and maximum 10 letters. Only latin letters and numbers can be used (space cannot be used). Once the username is chosen, it cannot be changed.

Gameplay
Each boss has a shield and the players must destroy it within a given time frame before they can finish the boss. After all the shield is destroyed, players can finish them. If they lose, they can repeat the fight until they won. Each raid-fight consists of one round, with every round lasting for 45 seconds. Players can buy several items like charges of darkness to aid them and deal additional damage. There are certain things that makes the raid-fights different from other fights:
 * The level and stats of all equipment does not affect raids much. What affects more is the enchantments on these equipment.
 * No perk works in raids, except Enlightenment.
 * Underworld bosses are more aggressive than other bosses.
 * They are also immune to the Stun enchantment.

Underworld
The first tier of the Underworld. There are four bosses in the first floor.

Eternals
Volcano - Eternal armed with Ornamental Sabers. First Boss

Megalith - Eternal armed with Coral Prickles. Second Boss

Fungus - Eternal armed with Two-handed Cudgel. Third Boss

Vortex - Eternal armed with Silver Glaive. Fourth Boss. Requires Dan 3

Special Bosses
They are the special bosses encountered in the first floor, available to be fought during the special event of the game (Halloween and Christmas). Fight with them carry random rules in each round.

Challengers
Morgana - Halloween special boss, armed with Pain and Panic.

Freeze - Christmas special boss, armed with Ringing Spruce Whirl.

Underworld : Tier 2
There are 3 bosses in tier 2: Fatum, Arkhos and Hoaxen. Players need to reach certain Dan before they can fight any boss in Tier 2. Fight with them carry random rules in each round.

Eternals
Fatum - Eternal armed with Grim Scythe. Fifth Boss. Requires Dan 4

Arkhos - Eternal armed with The Sting. Sixth Boss. Requires Dan 5

Hoaxen - Eternal armed with Harrier Hooks. Seventh Boss. Requires Dan 6

Underworld: Tier 3
This tier has one boss whose name and appearance is currently unknown.

Eternals
??? - Requires Dan 8

Items
There are various items available which can help player in beating the bosses. They can be obtained by defeating bosses, completing daily quests, or be bought from shop.

Charges
Deal a random damage between 75-84. Can be bought for 5 gems. It is the easiest charge to get. Player can get it as reward from beating any Eternals, daily quests, and at the end of season.
 * Minor Charges of Darkness

Deal a random damage between 500-531. Can be bought for 25 gems or 175 gems for 10 medium charges. It is harder to get compared to the small charges. Player can get it as reward from difficult daily quests, at the end of season, and by defeating Fungus, Vortex, Fatum, Arkhos, and Hoaxen.
 * Medium Charges of Darkness

Deal a random damage between 1000-1021. Can be bought for 35 gems or 299 gems for 10 large charges. It is the hardest charge to get. Unlike the small and medium charge, the large charge cannot be dodged. Players can get it by reaching first place in raids with Arkhos and Hoaxen.
 * Large Charges of Darkness

Elixirs
In development

Horns
In development

Rewards
Player will receive rewards at the end of a season, which last for three days. The rewards depends on players' score and position at the League window. The rewards are a supply of small and medium charges, raid keys, and a small amount of gems. Players at the 1st-5th place also have a chance to get a random item from the Monk's Set. The Monk's item obtained this way will not come with the default simple enchantment.

Dan
Dan is a level-like system. All players start with Dan 1. By accumulating enough score, they will receive Dan upgrade at the end of a season, along with additional rewards. Higher Dan allow players to fight bosses with Dan requirement. Currently, the highest Dan is 7.

Clan
Player can join a clan or create their own clan in Underworld. Being in clan will give player the advantages to fight bosses together with their clan members, thus making reducing the bosses' shield easier. It also provides a better chance to gather players during match-up.

Tips

 * Using certain weapon may allow the player to perform better in raids.
 * Obtaining Ranged Weapon and Magic can increase the player's performance. Ranged weapon is unlocked after defeating Lynx, and Magic is unlocked after defeating Hermit.
 * Enchantments can increase the player's performance. Players can enchant their equipment with Shadow Orbs that can be won from eclipse mode.
 * Some daily quests can reward the player with Charges of Darkness upon completed. Charges can help players in dealing damage.
 * Collecting the Monk's Set will unlock the Mythical enchantment Tempest Rage. Monk's Set and Tempest Rage can increase the player's performance greatly.

Trivia

 * Soon after the launch of the multiplayer mode the strength of the bosses' shields was decreased. However the damage they dealt was instead increased.
 * All Eternals wield gem weapons.
 * In the latest update, some Eternals' equipment are now enchanted.