Magic-Weapon Fusion



Throughout the series there are a variety of techniques that overlay or combine Magic with various weapons to create attacks bearing both physical and magical attributes. These techniques can be achieved in a variety of ways, such as utilizing the enchantmant of a Magic Weapon (魔法武器) or Holy Weapon (聖属武器), the effects of Skills such as Magic Aura, or through intricate manipulation of normally cast magical spells.

Magic Weapons
Though all weapons at or above Unique-Grade are guaranteed to possess some magical properties, only a very select few are ever showcased properly within the story.


 * Curse Sword (怨嗟の剣) - A magic weapon wielded by Albert. It's a cursed weapon that has the effect of draining the life force from both its victims and user.


 * Gobta's Kodachi (小太刀) - A magic weapon created by Rimuru Tempest and gifted to Gobta. The Unique Skill Degenerate was used to fuse the Ice Elemental Magic spell Icicle Lance to the blade. In addition to being able to fire lances normally, it is capable of coating itself in Ice with a technique known as Icicle Sword (水氷大魔剣).


 * Ice Blade (氷結魔剣) - A unique grade weapon wielded by Yamza and imbued with the Ice Elemental Magic spell, Ice Blizzard.


 * Vortex Spear (水渦槍) - A magical spear passed down as the heirloom of the Lizardmen and is currently owned by Gabiru. It was imbued with some sort of Water Magic Spell, which can cover the Spear in combat and used in a technique known as Vortex Crash (槍水流撃).

Magic Aura
Through the use of the Extra Skill Magic Aura (or backwards compatible skills like Demon Lord's Haki) or Mystic-Arts, it is possible to imbue one's Aura with magical effects. When used to coat a weapon, it creates a potent attack that can bypass almost any defense.


 * Saare's version of Aura Slash (気斬)

Holy Weapons
Equipment bearing the holy attribute, though immensly rare within the series, does exist. It is more common to see attacks imbued with Holy Energy such as the Holy Sword Arts wielded by Renard than it is to see full-blown holy weapons.


 * Dragon Buster (竜破聖剣) - A weapon created by the Seven Luminaries designed to be an anti-dragon weapon.


 * Holy Mace (神聖戦棍) - A mace wielded by Bacchus.

Overblade
Overblade (超絶聖剣技), despite being well suited as a blanket term for Magic-Weapon Fusion, has only been used to refer to weapon arts that make use of Miracle Level Holy Magic so far.


 * Holy Blade (聖剣発動)
 * Melt Slash (崩魔霊子斬)
 * Melt Strike (崩魔霊子突)
 * True Slash (真意霊覇斬)

Known Magic Overlayed with Weapons
The following magic have all been showcased to have been overlayed ontop of weapons within the series.


 * Black Flame
 * Black Flame-Thunder
 * Disintegration
 * Icicle Lance
 * Thunder Rain

Others

 * Aether Break (五色精霊剣)
 * Black Flame Slash (黒炎斬)
 * Haze Black Flame・Hundred Petals Rush (朧黒炎・百華繚乱)
 * Fortitude (堅忍不抜)
 * Imaginary Blade (虚無の剣撃)
 * Memory End Requiem (死せる者への鎮魂歌)
 * Storm Break (暴風黒魔斬)