The Grey Scarf of Abraxas is an Artifact that is independent from those of the Slayer's Collection. The Grey Scarf of Abraxas contains thousands upon thousands of Trigger Souls laid within Philosopher's Stones that were made into threads. It was used during the First Great Magic War and also the Second Great Magic War.
The Grey Scarf of Abraxas was capable of chain casting multiple Magics at a time due to its large number of Trigger Souls. It was also capable of unraveling to utilize all Trigger Souls at the same time which created a Unique effect known as "Magic Resonance" to those who had witnessed it before. This allowed the Mage utilizing the Grey Scarf of Abraxas to replicate any Magic he saw, regardless of his elemental affinities. Furthermore, the Grey Scarf of Abraxas was also able to seal away or limit a Mage's Mana Pool.