Acheron WorldDocumentation

Buffs, debuffs and potions

What each buff gives, which debuffs monsters apply and how much each potion restores.

A buff is a temporary advantage; a debuff is a disadvantage. Both show up in the buff bar, in the top-left corner, with an icon, a countdown in seconds and a progress bar — debuffs in red.

Almost every buff has its value and duration calculated from your energy. That's why even classes that don't use magic benefit from some energy: a buff cast by someone with high ENE lasts longer and is worth more.

The buffs#

SkillWhat it doesValueDuration
Mana Shieldreduces the damage takenup to 50%60 s or more
Defensecuts half of the damage taken−50%4 s
Greater Defenseadds defensegrows with ENE60 s
Greater Damageadds physical and magic damagegrows with ENE60 s
Greater Lifeincreases max healthup to +100%60 s or more
Greater Critical Damageadds critical damageENE and CMD60 s or more
Infinity Arrowdoesn't use arrows—30 minutes
Magic Circleadds minimum magic damageENE30 minutes
Damage Reflectreturns damage to the attackerup to 50%30 s or more
Sword Powermore damage and mana, ignores defense, but reduces your max healthup to 100%30 s or more
Greater Ignore Defense Ratechance to zero the target's defenseENE ÷ 100 %60 s or more
Fitnessadds vitalitygrows with ENE60 s or more
Greater Defense Success Rateadds defense rategrows with ENE60 s or more
Blessadds strength, agility, vitality and energyENE ÷ 1005 minutes
Iron Defense+800 health and +800 defense, immune to debuff800 / 80010 s
Blood Howling10% chance of +200 damage per hit—60 s

A few details that change the game:

  • Mana Shield doesn't consume mana here. It's pure damage reduction, which makes it much better than it looks.
  • Defense requires a shield in the left hand and lasts only 4 seconds, but half the damage is half the damage. It's the Dark Knight's emergency skill.
  • Sword Power reduces your max health in exchange for the damage. If you're on the edge, it can kill you.
  • Iron Defense lasts 10 seconds, but +800 health and +800 defense is the biggest instant turnaround in the game.
  • Greater Life, Greater Critical Damage, Fitness and Greater Defense Success Rate affect the whole party in range, not just you.
  • Greater Mana, Invisibility and the removal skills only work inside Castle Siege.

Recasting with a worse value doesn't downgrade the buff while the current one still has more than 3 seconds.

In Chaos Castle you can only buff yourself.

The auto-hunt keeps up to 4 buffs recast on its own.

The debuffs#

SkillEffectDuration
Sleepsleeps until it takes real damageup to 5 s
Lesser Damagereduces the damage dealt by the target, in an area5 s or more
Lesser Defensereduces the target's defense, in an area5 s or more
Blindcuts half of the hit rate5 s
Earth Prisonstuns in an area5 s
Sternprevents walking and attacking (Castle Siege only)10 s

Two strikes carry a built-in debuff: Frozen Stab freezes for 2 seconds, and Poison Arrow applies Lesser Damage for 10 seconds.

How to get rid of them#

  • Cure removes Sleep, Stern, Lesser Damage and Blind from an ally.
  • The Antidote, an inventory item, clears the same effects on you.
  • Iron Defense makes you immune to debuffs while it lasts.
  • Dying clears everything — buffs and debuffs.

The potions#

All of them restore a percentage of your maximum, not a fixed value. That means the same potion works from level 1 to 400.

Health (key Q)#

PotionRestores
Apple12%
Small Healing Potion25%
Healing Potion38%
Large Healing Potion55%
Medium Elite Healing Potion55%
Elite Healing Potion70%

Mana (key W)#

PotionRestores
Small Mana Potion25%
Mana Potion38%
Large Mana Potion55%
Elite Mana Potion70%

Shield — SD (key R)#

PotionRestores
Small SD Potion30%
Siege Potion40%
SD Potion45%
Large SD Potion60%
Elite SD Potion70%

Stamina — AG (key E)#

Ale restores 45%.

Complex potions#

PotionHealthManaStamina
Small Complex Potion15%15%20%
Complex Potion25%25%35%
Large Complex Potion40%40%55%

Complex potions restore three resources at once and take up a single slot — they're the best choice if you have little inventory space.

Potion rules#

  • Minimum interval of 0.7 seconds between doses. No point hammering the key.
  • The key always picks the best potion of that type you have.
  • The game doesn't drink if the resource is already full.
  • In the auto-hunt, the health potion triggers below 45% by default (adjustable from 10% to 90%); the mana one stays off until you turn it on.

Natural regeneration#

Without drinking anything, per second:

ResourceRegeneratesCondition
Health+6%only after 5 seconds out of combat
Mana+8%always
Stamina (AG)+12%always
Shield (SD)+4%always

Health doesn't regenerate during a fight. That's the classic MU rule and the reason potions exist. If you can stay out of combat for 5 seconds, you recover everything in less than 20.

Other consumables#

  • Town Portal Scroll returns you to town. Doesn't work inside an event.
  • Antidote clears debuffs.