edge and anti-magic

Madrigal had worked it out. He thrashed to one side of the trough Ramirez's spell had eaten in the floor, thrust the handle of his spear down into the ultrafine dust, and shoved himself roughly up and out of the sand trap.
But not before Ramirez drew the silver Warden's blade from his hip, the sword designed to let the Wardens of the White Council slice into any enchantment, unraveling it with a single stroke. Carlos drew it, lunged out onto his wounded leg with a cry of pain and challenge, and sliced the willow blade left and right at Madrigal while the spear was grounded and locked into place, supporting him.
The sword cut through the wooden haft of the spear, snicker-snack, which was itself an indicator of just how unbelievably sharp an edge it had to have carried. Luccio did good work. That was just collateral damage, though.
The Warden blade also licked lightly across each of Madrigal's arms.
The black cloth armbands erupted into sudden flame, the embroidered symbols on them flaring into painfully brilliant light, as if the scarlet thread had been made of magnesium. Any construct that held enough energy to counteract the magic of a major-league wizard, especially a combat specialist like Ramirez, had to have been holding all kinds of energy. Ramirez had just cut it loose.
Madrigal stared down in sudden panic at the fire writhing up his arms and let out a horrified scream.


White Night chapter 38, Page 399-400