Beast Arm: Black Bull

Beast Arm: Black Bull (黒牛 Kokugyū) is a Beast Soul Spell.

Description

The user transforms their right arm into a large black arm of an unknown beast that increases the power of their punches.^[1]

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Animal Soul
Lisanna's Spells	Animal Soul: Bird • Animal Soul: Cat • Animal Soul: Fish • Animal Soul: Harpy • Animal Soul: Nine-Tailed Fox • Animal Soul: Mermaid • Animal Soul: Penguin • Animal Soul: Pig • Animal Soul: Rabbit • Animal Soul: Snake
Beast Soul
Elfman's Spells	Beast Arm: Black Bull • Beast Arm: Iron Bull • Beast Arm: Jet Black Sword • Beast Arm: Scale Bull • Beast Arm: Stone Bull • Beast Soul: Bear • Beast Soul • Beast Soul: Ape • Beast Soul: Belcusas • Beast Soul: Lizardman • Beast Soul: Sand Beast • Beast Soul: Werelion • Beast Soul: Weretiger
Artificial Lizardman's Spells	Beast Arm: Iron Bull
God Soul
Dimaria's Spells	God Soul: Chronos • Overflow
Machina Soul
Jenny's Spells	Battle Suit
Satan Soul
Mirajane's Spells	Satan Soul • Satan Soul: Halphas • Satan Soul: Hell’s Core • Satan Soul: Mirajane Alegria • Satan Soul: Mirajane Seilah • Satan Soul: Sitri
Video Game-Only Spells
Mirajane's Spells	Rampant Demonic Blade • Satan Soul: Mard Geer Tartaros
Lisanna's Spells	Animal Soul: Armadillo • Animal Soul: Owl
Elfman's Spells	Beast Soul: Vulcan • Fairy Bomb Storm
Jenny's Spells	Machina Soul: Christina