Debuff Types & Contents They Are Effective At

Debuff Types & Contents They Are Effective At for Seven Knights Re:BIRTH. Read ahead to see a full list of debuffs, their effects, and the content where debuffs are relevant!

List of All Debuffs and Effects

Stat Decrease Debuffs

Stat decreasing debuffs come in different types. When multiple debuffs with the same time of duration are applied, only the debuff with the highest value will still be active.

List of Stat Decrease Debuffs
Debuff	Effect
Attack Reduction	Decreases Attack by a certain percentage. These debuffs are divided into Physical, Magic, or All Attack Reduction, reducing only their respective Attack stat. If All Attack Reduction and Physical or Magic Attack Reduction are applied at the same time, only the debuff with the higher value will be active.
Damage Reduction	Decreases damage dealt by a certain percentage. These debuffs are divided into Physical, Magic, or All Damage Reduction, reducing only their respective damage type. If All Damage Reduction and Physical/Magic Damage Reduction are applied at the same time, only the debuff with the higher value will be active.
Vulnerability	Increases damage taken from the enemiy. In the case of Physical/Magic Vulnerability, the respective type of damage taken is enhanced.
Defense Reduction	Decreases Defense by a certain percentage. If there are multiple Defense Reductions,only the buff with the highest value will apply.
Crit Rate Reduction	Decreases Critical Hit chance.
Crit Damage Reduction	Decreases damage when landing Critical Hits.
Weakness Hit Chance Reduction	Decreases Weakness Hit chance.
Effect Hit Rate Reduction	Decreases Effect Hit Rate.
Effect Resist Reduction	Decreases Effect Resistance.
Block Rate Reduction	Decreases Block Rate.
Outgoing Healing Reduction	Decreases all Healing effects the target casts.
Incoming Healing Reduction	Decreases all Healing effects the target receives.
Increased Missed Chance	Increases attacks' Miss Chance.
Confusion	The chance of hits missing is increased to 100% a set number of times. As long as at least 1 stack of the effect remains, all hits will be affected by Confusion, regardless of the number of hits left on the effect.

Damage Over Time Debuffs

Damage Over Time debuffs deal damage to a target at the start of each turn, and the same Damage Over Time Debuff can stack multiple times on the same target.

List of Damage Over Time Debuffs
Debuff	Effect
Burn	Deals damage equal to 80% of the caster's Attack every turn.
Dragonflame	Receives damage equal to 120% of the caster's Attack every turn and is considered a Burn effect.
Bleed	Deals Piercing damage equal to 60% of the caster's Attack every turn. The damage increases for every stack of Bleed on the target, capping at 5 stacks.
Poison	Deals damage equal to 6% of the target's Max HP every turn. This damage cannot exceed 150% of the caster's Attack.
Burn Explosion	Consumes active Burn stacks on a target to deal instant damage proportional to the amount of turns remaining of Burn. The total damage multiplier may differ depending on the skill.
Bleed Explosion	Consumes all active stacks of Bleed on a target to deal instant damage proportional to the amount of turns remaining of Bleed. The total damage multiplier may differ depending on the skill.
Poison Explosion	Consumes all active stacks of Poison on a target to deal instant damage proportional to the amount of turns remaining of Poison. The total damage multiplier may differ depending on the skill.
Death	Deals damage equal to 20% of the target's current HP every turn for 3 turns. The target dies instantly upon expiration. Being inflicted with Death again while Death is active also results in instant death.

Crowd Control Debuffs

Targets with this debuff have all or some actions restricted. Some of these debuffs have additional effects.

List of Crowd Control Debuffs
Debuff	Effect
Stun	Stunned targets cannot perform any actions.
Paralysis	Paralyzed targets cannot perform any actions, and their Block Rate becomes 0%.
Shock	Shocked targets cannot perform any actions and take additional damage equal to 40% of the caster's Attack when hit by an enemy's attack.
Freeze	Frozen targets cannot perform any actions, and the Freeze debuff is removed when hit by an enemy's attack. When Freeze is removed or expires, it deals Defense-Ignoring damage equal to 40% of the target's Max HP, but the damage cannot exceed 300% of the caster's Attack.
Petrify	Petrified targets cannot perform any actions. When Petrify is removed or expires, it deals damage equal to 120% of the caster's Attack.
Blind	Blinded targets' basic attacks, counterattacks, and follow-up attacks are guaranteed to miss.
Silence	Silenced targets cannot trigger active skills.
Sleep	Unable to act for the duration of the effect, and any attacks against the afflicted target land as Guaranteed Critical Hits. The effect is removed when the target takes damage equal to 7% or more of their Max HP, regardless of the remaining turns in the effect's duration.

Other Debuffs

These debuffs have special effects.

List of Other Debuffs
Debuff	Effect
Reduced Buff Duration	Buff Duration Reduction decreases the duration of turn-based buffs by a set number of turns. If a buff's remaining turns reach 0 or lower, the buff is instantly removed. (Affected by Effect Hit Rate and Effect Resistance stats)
Buff Removal	Buff Removal dispels a set number of removable buffs from a target in the order they were received. (Affected by Effect Hit Rate Resistance stats)
Barrier Removal	Removes the target's Barrier.
Cooldown Increase	Increases skill cooldown by a set value. This effect cancels the skill queue of a target inflicted with Cooldown Increase.
Focus Target	The enemy marked with Focus Target is always included as a target for attacks from the ally team. Only one member ofthe team can have this debuff at a time.
Unable to Recover	Unable to Recover blocks all healing effects on this target.
Souldeath	Dying while Souldeath is active prevents the target from being revived through Immortality or Revival.
HP Alteration	HP Alteration instantly sets the target's current HP to a set percentage, ignoring any Barriers, Damage Immunity, and Damage Nullification effects on the target. HP Alteration's effect probability is not affected by Effect Hit Rate and Resistance stats, and the effect is guaranteed to apply.
Execution	Execution instantly kills a target if their HP is below a set percentage of the caster's Attack. The Effect probability of Execution is not affected by Effect Hit Rate and Resistance stats.
Magic Reflux	When inflicted with Magic Reflux, a target takes damage equal to 12% of their Max HP, but this damage cannot exceed 90% of the caster's attack. A max of 7 stacks of Magic Reflux can be inflicted. When hit, the target receives damage proportional to the number of active stacks. When a hero inflicted with Magic Reflux falls in battle or Magic Reflux ends, it has a 100% chance of being passed onto 3 heroes on the target's team. Magic Reflux cannot be inflicted in Raids, Power Up Dungeons, and Castle Rush.
Bomb	When a Bomb's duration expires, it detonates, dealing Defense-Ignoring damage equal to 120% of caster's attack. Upon detonation, there's a 100% chance of infliction a Buff Duration Reduction of 1 turn and a 60% chance of inflicting Paralysis for 2 turns. Up to 3 bombs can be deployed. This damage ignores 40% (fixed) of the target's Defense. Bombs cannot be deployed in: Raids, Power Up Dungeons, Tower of Trials Bosses, and Castle Rush.
Detonates Bombs	Deals damage by detonating bombs on the target. Damage increases with the number of bombs detonated.

Content with Debuffs

Content that Needs Debuff Immunity

This is a list of content that requires Debuff Immunities and the heroes who provide it. Use this to check for content you can clear with the heroes you own.

*Essentially, the immunity effects apply to all allies.

Status Ailment Immunity	Content	Hero
Burn Immunity	Fire Particle Dungeon Destroyer Gaze Raid	Ariel Yui
Bleed Immunity	Ox King Raid	Karon
Poison Immunity	Iron Devourer Raid	Lucy
Death Immunity	Dark Particle Dungeon	Leo
Stun Immunity	Earth Particle Dungeon Destroyer Gaze Raid	Sieg Evan
Paralysis Immunity	Iron Devourer Raid	Victoria
Shock Immunity	Light Particle Dungeon	Chloe
Freeze Immunity	Water Particle Dungeon	Lania Feng Yan
Petrify Immunity	Ox King Raid	Daisy Black Rose
Crowd Control Immunity​	Earth Particle Dungeon  Light Particle Dungeon  Water Particle Dungeon Destroyer Gaze Raid  Ox King Raid Iron Devourer Raid	Rudy Jave Juri (*For Jave and Juri, the immunity only applies to themselves)

Content Vulnerable to Debuffs

This is a list of content where applying debuffs is effective and the heroes who can apply them. Only content where they are particularly effective is listed here, but other status ailments are also effective in Adventure, Infinite Tower, and PvP content like the Arena and Total War.

Earth Particle Dungeon (Apply Burn)

Burn Characters
Rachel	Jave	Fai	Velika
Snipper	May	Yuri

Dark Particle Dungeon (Apply Bleed)

Bleed Characters
Bi Dam	May	Rei	Soi
Leo	Taurus	Kai	Jak
Toto	Cellops	Charles	Ricky
Reaper

Water Particle Dungeon (Apply Poison)

Poison Characters
Jane	Jupy	May	Rei
Cleo	Derek	Syllops

Fire Particle Dungeon (Apply Freeze)

Freeze Characters
Spike	Heavenia	Lania	Ahkan
Fruna

Related Seven Knights Re: BIRTH Articles

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Best Hero Tier List	Reroll Tier List

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Articles To Check
How To Reroll Fast?	Leveling & Ruby Farming Guide	Daily Things to Do
For Early Game
Early Game Guide	Player Rank (Adventurer Skill) Guide	Power Up Guide
Equipment Powerup	Pet Guide	Formation Guide
Guild Guide	Party Guide	Debuff Types Guide
Lists
All Characters	Voice Actor List	Statuses and Effects

Hero Per Specialty

By Grade
Legendary					Rare					Uncommon					Common
By Max Star Rank
6★					5★					4★					3★
Per Type
Attack				Magic				Defense				Support				Universal
By Attack-Type
Physical										Magic

Legendary Characters

Seven Knights
Rudy	Rachel	Eileene	Spike
Jave	Kris	Dellons	Vanessa
Seven Knights of the Old
Fai	Rosie	Juri	Secret
Secret	Secret	Secret
Apprentice Priest
Mercure	Colt	Platin	Secret
Secret
Four Lords
Ace	Rin	Secret	Secret
Four Lords of Old
Teo	Yeonhee	Karma	Secret
Night Crow
Taka	Orly	Secret	Secret
Secret
Hidden Masters
Klahan	Secret	Miho	Secret
????
Silvesta
Adventurer
Velika
Terra
Rook	Chancellor	Alice	Aragon
Biscuit
Holy Cross Crusaders
Ruri	Nia	Espada	Shane
Sieg
Shadow Clan
Ballista
Purgatory
Knox
Moonlit Isle
Lina	Daisy
Eastern Aisha
Yu Shin	Bi Dam
Sanctuary of Darkness
Pascal

Rare Heroes

Evan	Karin	Ariel	Bane
Heavenia	Hellenia	Karon	Catty
Chloe	Jane	Jupy	Joker
Sylvia	Jin	Snipper	Sera
Noho	Victoria	Black Rose	May
Yui	Yuri	Lania	Li
Lucy	Rei	Asura	Soi
Feng Yan	Cleo	Sarah	Hokin
Rahkun	Leo