Sea Dragon's Iron Fist

Blood Dragon's Iron Fist (血竜の鉄拳 Chiryū no Tekken) is a Water Dragon Slayer Magic Spell.

Description
An enhanced version of Water Dragon's Iron Fist, only performable if the user is bleeding from their hand. Much like the original spell, the user engulfs their fist, this time in their own blood, and punches at their target; this spell can break through defenses that are immune to water-type damage.