Blade of Annihilation

Blade of Annihilation
Magic Resistance: Yes
Ultimate Eldritch Spell [Magical]
Prerequisites: Eldritch Rank 10
Disciplines: Enchantment
Potency: [2d8 + Eldritch Rank]
Cast Action [CT 9, REC 8]
Components: V, S
Cost: 1 Karma, 8 Stamina and 4 Stamina Burn
Duration: 1 moment or until dismissed, dispelled or disrupted.
Effect: From the energies of discordant Eldritch power, you enchant a section of space in front of you, forming a swirling, chaotic blade of black and purple destructive force. The blade hovers by your side, attacking at your effortless command. For the duration of this spell, you gain the following special action:
Free Action
Limitation: Once per round.
Effect: Your blade strikes out at your opponent, before returning to your side. Make an attack:
Range: 50ft
Target: One creature or object within range
Attack: Arcana vs. Touch
Hit: 2d10 + 100 + Eldritch Might Annihilation damage. If this damage reduces the target to 0 hitpoints, the target dies and its body is destroyed. If the target is a mundane held object or Magical Consumable Item, it is destroyed. If the target is a Magical Item or Trinket, roll 1d10. If your result exceeds the rank of the item, it is destroyed.
Special: If the target is an unattended item, the attack automatically hits.
Structural Effect: Structures targeted by the Blade are subject to attack, Demolition +30 vs Durability.
Augment, Annihilating Edge
[Eldritch Rank 10, Stacking]
Stacking [Rank 10, 11, 12, etc]: This augment may be applied multiple times and is limited by your Eldritch Rank.
Effect: Increase the damage dealt by 2d10.