Weave slicers are rogues trained in the art of weave, but for a different purpose than arcane tricksters. Weave slicers use the weave to their advantage against those who are normal users of magic, they weave and slice with deadly anti-magic purpose.

Quilted Steel

Starting at 17th level, you have advantage whenever you attack a creature that casted a spell in the last minute, a creature wearing magical clothing/armor, a creature currently affected by a spell, or a creature that is attuned to a magical item. When you attack a creature that meets those conditions add 2d6 psychic damage to that attack.

Sit and Knit

Starting at 3rd level, you have advantage when attacking creatures that are concentrating on spells and gain proficiency in weaver's tools.

Slip Stich

Starting at 3rd level, you can use a bonus action to cut a creature off from the weave, disabling it's magical abilities, weapons, and it's ability to cast spells until the start of your next turn. If the creature was casting a spell or was maintaining concentration on a spell, the spell fizzles.

This ability can be used a number of times equal to your proficiency bonus.

Delightful Pattern

Starting at 9th level, whenever a creature that you can see or hear within 60ft attempts to cast a spell you can spend your reaction to take an action.

You can use this ability once per long rest at 9th level, twice per long rest at 14th level, and three times per long rest at 18th level.

Cross Threading

Starting at 13th level, you can use your reaction to attempt to interrupt a creature in the process of casting a spell. If the creature is casting a spell of 3rd level or lower, its spell fails and has no effect. If it is casting a spell of 4th level or higher, make an ability check using your DEX mod. The DC equals 12 + the spell's level. On a success, the creature's spell fails and has no effect. If the spell doesn't fail, the creature that was casting the spell takes Xd6 psychic damage, where X is your DEX mod.

You can use this ability a number of times equal to your proficiency bonus.