Effect Duration Boost
Buff ID N/A
Passive ID 11009

Effect Duration Boost is an effect that can either extend the turn duration of certain buffs or reduce the turn duration of specific debuffs.

For example, Nia, Maverick of Elysia's Extra Skill effect reduces the duration of the Turn Skip debuff by 3 turns. This makes her immune to any Turn Skip effects that last for less than 3 turns.

Buff Application

If a unit's buff were to have its effect duration reduced to 0 turns, the effect will not apply at all. This also means a buff with an effect duration of 0 turns cannot overwrite pre-existing buffs.

For example, if Damage Mitigation effects have their effect duration reduced by 2 turns, Reborn Íkaros Azius' 3-turn mitigation effect on SBB will only last for 1 turn. If Divine Savior Mikael's 2-turn mitigation effect on SBB were to activate, Mikael's mitigation effect will not overwrite Azius' mitigation effect.

A Feast of Tears

BFWiki AFeastOfTearsEffects.png

Certain quests have invisible enemies usually named A Feast of Tears. These are not meant to be targeted, as they cannot be targeted without scrolling through each enemy that appears in battle while checking enemy buffs. Additionally, they have Damage Immunity and Stealth effects active throughout the entire fight. When present in battle, they reduce the buff turn duration of the following effects:

Buff Buff Icons
Damage Mitigation Regular mitigation.png
Elemental Mitigation Elementalmitigation fire.pngElementalmitigation water.pngElementalmitigation earth.pngElementalmitigation thunder.pngElementalmitigation light.pngElementalmitigation dark.png
Evasion Evasion buff.png
Parameter Boost Atk buff.pngDef buff.pngRec buff.pngCrit rate up.png
Self Parameter Boost Self atk buff.pngSelf def buff.pngSelf rec buff.pngSelf crit buff.png
Elemental Parameter Boost Paraboost fire atk.pngParaboost fire def.pngParaboost fire rec.pngParaboost water atk.pngParaboost water def.pngParaboost water rec.pngParaboost earth atk.pngParaboost earth def.pngParaboost earth rec.pngParaboost thunder atk.pngParaboost thunder def.pngParaboost thunder rec.pngParaboost light atk.pngParaboost light def.pngParaboost light rec.pngParaboost dark atk.pngParaboost dark def.pngParaboost dark rec.png
Parameter Conversion Conversion attack.pngConversion defense.pngConversion recovery.png
Self Parameter Conversion Self atk buff.pngSelf def buff.pngSelf rec buff.png
Spark Boost Spark buff.png
Self Spark Boost Self spark buff.png
Elemental Spark Boost Elemspark fire.pngElemspark water.pngElemspark earth.pngElemspark thunder.pngElemspark light.pngElemspark dark.png
Critical Damage Boost Crit dmg.png
Elemental Critical Damage Boost Elemcrit fire.pngElemcrit water.pngElemcrit earth.pngElemcrit thunder.pngElemcrit light.pngElemcrit dark.png
Elemental Damage Boost Ewdbuff fire.pngEwdbuff water.pngEwdbuff earth.pngEwdbuff thunder.pngEwdbuff light.pngEwdbuff dark.png
Gradual BB Gauge Boost Bb over time.png
BC Fill when attacked Bb when attacked buff.png
BC Fill on Spark Bb on spark buff.png
BC Efficacy Bb fill rate.png
OD Gauge Fill Rate Od fill rate.png
Gradual OD Fill Od over time.png

A Feast of Tears generally reduces the duration of the above effects by 2 turns while present. Exceptions to this include the following:

Effect Content
3-turn reduction
4-turn reduction
  • Battle 5 of Frontier Spire's Unknown Sector
    • Occurs only if A Feast of Tears is present while Phantom Ensa-Taya is alive
    • Multiple copies of A Feast of Tears can be summoned, causing effect durations to be reduced by an additional 2 turns for each A Feast of Tears present


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