Barrier is a mechanic introduced with the 
Atlas of Discovery Expansion. A Barrier is a secondary health bar that some Monsters have that appears above the normal health bar in combat.
Mechanics
A monster with Barrier cannot have its health reduced by any means (including debuffs like Bleeds or Poisons). In order to kill these monsters, their Barrier must first be reduced to 0.
Barriers can only be damaged by the attacks of 
Summoning Familiars. There are a variety of items in the Atlas of Discovery expansion which increase the effectiveness of Familiars.
Some enemies have a passive ability by which they regenerate barrier by 25% every 7 attack turns. This regeneration effect can happen after their Barrier has reached 0. When the Enemy regenerates Barrier, they will gain a debuff that applies +5% Attack Interval, -10% Global Accuracy, and -10% Global Evasion, stacking up to 4 times. Monsters from 
Eye-conic Cave, 
Mucky Cave, 
Tree Overgrowth, 
Collapsed City, 
Golem Territory & 
Unholy Forest do not regenerate Barrier.
Getting Started
- Most, if not all, gear from the base game can be upgraded once into (B) Barrier Gear which typically give +x Flat Summoning Damage as well as +x% Summoning Familiar damage added as extra damage to Barrier
- Starting from (B) Mithril, (B) Green D-hide, and (B) Acolyte Wizard, (B) Barrier Gear will provide +x% chance to dodge Crystallization from being applied which is essential when dealing with mobs that apply Crystallization, like those found in
Crystal Caves
- Melee gear starting from Mithril can be further upgraded into (C) Barrier Gear. Starting from (C) Rune, these give +x% chance to dodge Crystal Sanction from being applied which is essential when fighting mobs from
Crystal Depths
- There's a few options for a starting Barrier gem. A
Basic Barrier Gem and 
Barrier Gem can be obtained from 
Archaeology at level 1 and 6 respectively. You may also obtain a 
Barrier Touch Gem from Eye-conic Cave. These will be quickly replaced by the 
Sapping Barrier Gem.
- An
Amulet of Barrier Touch and 
Ring of Barrier Touch can be made in 
Crafting at level 20. The necklace will be quickly replaced by the 
Lesser Summoning Amulet.
- The Lesser Summoning Amulet from
Blind Ghost in Eye-conic Cave is quite powerful for a while
- The
Blind Warrior in Eye-conic Cave drops a 
Barrier Touch Shield. You may also get a 
Book of Occults from 
Necromancer if you have the Combat stats to do so
- The
Vampiric Bat in Mucky Cave drops 
Barrier Sapping Gloves and Sapping Barrier Gem which is an upgrade to all the previously mentioned Barrier Gems. These gloves can be upgraded into 
Barrier Draining Gloves after you have beaten Golem Territory and obtained 10 
Draining Barrier Gems. There is a Township task that will give 3 Draining Barrier Gems upon 1 completion of Golem Territory
- The
Tortoise and it's synergies can be good for dealing with harder Barrier mobs and Dungeons however using this early is quite over kill
- There's a few options for reducing Summoning Attack Interval. These are
Summoner's Defender, obtained from 
Trickery Temple, which can be upgraded into 
Knight's Summoning Defender, the 
Summoner's Blessed Ring obtained from 
Cult Grounds, and the 
Summoner's Blessing which is a consumable that is purchased from the Shop for 100
and 10 
Museum Token each
- There are 3 sources of Barrier Burn,
Barrier Igniter Potion, 
Barrier Burn Shield and the Tortoise 
Dragon Summoning Familiar Synergy. This is a quite powerful Damage over Time effect.
Skill Boosts
- Main article: Barrier Boosts
Skill boosts are special enhancements that improve the efficiency and effectiveness of the player's skills. These boosts can come from a variety of sources such as equipment, potions, pets, and masteries. Global boosts are boosts which apply across all skills. A boost can be assumed to be for the listed skill only, unless specifically stated it is a global boost. Boosts help the player to progress faster and achieve higher levels of mastery in each skill. The following are some common types of skill boosts and what they do:
- Increased Skill XP: Increases the amount of experience points (XP) gained.
- Decreased Skill Interval: Reduces the time it takes to complete skilling actions, allowing the player to perform more actions in a given period.
- Preservation Chance: Increases the likelihood that resources or items used during skill actions are not consumed.
- Increased Chance to Double Items: Gives a higher chance of receiving double the items or resources when performing skill-related actions.
- Increased Mastery XP: Enhances the rate at which mastery XP is gained for a skill.
For more information on general skill boosts that apply to all skills, refer to the Skill Boosts page.
Combat:
