Arcane Fellstone

Arcane Fellstone
Weapon type
Might	16
Range	1
Required	Flametongue
SP	300
Exclusive?	No
Arcane?	Yes
String ID	SID_魔器・歪神竜の竜石
Numeric ID	4141
Description	Accelerates Special trigger (cooldown count-1). At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = 25% of foe's Atk at start of combat - 4 (max 14; min 5), reduces damage from foe's first attack by 40% ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and grants Special cooldown charge +1 to unit per attack during combat (only highest value applied; does not stack), and also, if unit's Spd > foe's Spd, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res.

Effects

Effects	Targets	Conditions
Permanent effects
Accelerates Special trigger	Unit	—
Combat effects
Atk/Spd/Def/Res+X (min: 5, max: 14) X = 25% of  Foe's Atk at start of combat -4	Unit	Unit's HP ≥ 25% at start of combat
Reduces damage by 40% from  Foe's first attack (including second attacks)
Special cooldown charge +1
Neutralizes "Guaranteed follow-up"	Foe	Unit's HP ≥ 25% at start of combat &  Unit's Spd >  Foe's Spd
Neutralizes "Prevent follow-up"	Unit
Damage uses the lower of  Foe's Def/Res		Foe's Range = 2

Notes

• The stat increase that can be applied by Arcane Fellstone is considered a temporary buff.
• A stat comparison made "At start of combat" ignores temporary buffs and temporary debuffs.
  • Temporary buffs and temporary debuffs from skills such as Death Blow and  Rauðrfox+ will not affect the outcome.
  • Only stat boosts outside of combat, such as  Bonuses and  Penalties, will affect the outcome.

• The damage-reduction effect is calculated after offensive Specials and damage boosting effects such as  Arcane Lúin and  Dominance.
  • If a skill such as  Miracle or  Everliving Domain can trigger, the damage-reduction effect will not trigger and the user will still survive with only 1 HP.
  • "Reduces damage by X%" effects stack multiplicatively, unlike interactions related to the weapon-triangle, such as  Triangle Adept and the weapon-triangle advantage boost.
    • For example, if both  Dodge and  Gust trigger, the maximum total damage-reduction is 64% instead of 80%, since the two skills reduce the damage to (1 − 40%) × (1 − 40%) = 36% of the original damage.
  • Non-Special "reduces damage by X%" effects can be neutralized or reduced by effects such as  Share Spoils or  Halves non-Special damage reduction.
  • For more information, see Damage calculation.

• The "Special cooldown charge +X" effect will stack with the "Special cooldown charge -X" effect.
  • For example, if a unit is affected by both  Guard and  Special Cooldown Charge +1, the effects will stack and the cooldown will go down without penalty or bonus.
  • If the effect is active, the unit will gain 2 charges from both attacking and being attacked.
• If used alongside another source of "Special cooldown charge +X", only the higher of the two charge increases will apply.
  • This means that if a unit has two "Special cooldown charge +1" effects from two different sources, the battle will play out as if only one "Special cooldown charge +1" effect is active.
• Skills such as  Spd/Def Tempo 4 and  Spendy Scimitar will neutralize effects that grant "Special cooldown charge +X" to the foe.

• Arcane Fellstone will not neutralize the additional follow-up of 【Potent Follow X%】 or 【Potent Follow 100%】.
• Effects that are neutralized by Arcane Fellstone:
  • Effects that grant the foe a guaranteed follow-up such as  Quick Riposte 4,  Guaranteed Follow-Ups, or the Grand Conquests  Cavalry area effect.
  • Effects active on the unit that prevent their follow-up attacks, such as  Windsweep 3,  Watersweep 3, or  Weaving Fighter.
  • Effects active on the foe that prevent the unit's follow-up attacks such as  Steady Impact,  Vengeful Fighter 4, or  Foe Cannot Follow-Up.
• Attacks that "calculate damage using the lower of foe's Def or Res" include attacks during combat and area-of-effect Specials.
  •  Close Ward,  Mystic Boost 4,  Divine Naga,  Naga,  Spirit Forest Writ,  Splashy Bucket, and  Splashy Bucket+ will disable this effect.
  •  Rare Talent,  Aureola,  Radiant Aureola, and  Light and Dark II will disable this effect during combat, but not against area-of-effect Specials.

Upgrades

Can be upgraded in the Weapon Refinery. For a list of other such weapons, see list of upgradable weapons.

Type	Stats	Description	Cost
	+5 HP, +2 Mt	Accelerates Special trigger (cooldown count-1). At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = 25% of foe's Atk at start of combat - 4 (max 14; min 5), reduces damage from foe's first attack by 40% ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and grants Special cooldown charge +1 to unit per attack during combat (only highest value applied; does not stack), and also, if unit's Spd > foe's Spd, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res.	350 SP,  500,  200
	+5 HP, +3 Spd	Accelerates Special trigger (cooldown count-1). At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = 25% of foe's Atk at start of combat - 4 (max 14; min 5), reduces damage from foe's first attack by 40% ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and grants Special cooldown charge +1 to unit per attack during combat (only highest value applied; does not stack), and also, if unit's Spd > foe's Spd, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res.	350 SP,  500,  200
	+5 HP, +4 Def	Accelerates Special trigger (cooldown count-1). At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = 25% of foe's Atk at start of combat - 4 (max 14; min 5), reduces damage from foe's first attack by 40% ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and grants Special cooldown charge +1 to unit per attack during combat (only highest value applied; does not stack), and also, if unit's Spd > foe's Spd, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res.	350 SP,  500,  200
	+5 HP, +4 Res	Accelerates Special trigger (cooldown count-1). At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = 25% of foe's Atk at start of combat - 4 (max 14; min 5), reduces damage from foe's first attack by 40% ("first attack" normally means only the first strike; for effects that grant "unit attacks twice," it means the first and second strikes), and grants Special cooldown charge +1 to unit per attack during combat (only highest value applied; does not stack), and also, if unit's Spd > foe's Spd, neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res.	350 SP,  500,  200

List of owners

Unit	Skill chain
Lumera: Corrupted Dragon	Fire Breath 5	Fire Breath+ 5	Flametongue 5	Arcane Fellstone 5

Gallery

• 

  Sprite sheet for  Fell Child's Might and Arcane Fellstone's animation.

Availability

Summoning events

Start	End	Event	Skill
2024-05-08	2024-06-07	New Heroes & Rearmed Lumera	Arcane Fellstone
2024-08-30	2024-09-13	Legendary Heroes - Shez	Arcane Fellstone
2024-10-11	2024-10-25	Ascendant, Rearmed & Attuned	Arcane Fellstone

Distributed units

• This skill is not available on any distributed units.

Combat Manuals

• This skill has not been available on any distributed Combat Manuals.

In other languages

Language	Name
Japanese	魔器・歪神竜の竜石
German	Arkaner Stein
Spanish (Europe)	Piedra arcana
Spanish (Latin America)	Piedra arcana
French	Pierre arcane
Italian	Pietra arcana
Traditional Chinese (Taiwan)	魔器・歪神龍的龍石
Portuguese	Pedra arcana

See also

• Arcane Blutgang
• Arcane Devourer
• Arcane Giant Axe
• Arcane Lúin
• Arcane Nihility
• Arcane Sly Knife
• Arcane Tempest
• Arcane Thunder
• Arcane Truthfire
• Arcane Þrima
• Berserker Axe
• Caladbolg
• Dragon's Stone+
• Icebound Tome
• Monarch's Stone
• Professorial Text
• Striving Sword