Board Thread:Episode Discussion/@comment-4010415-20170717151617/@comment-25936766-20170719013251

There's a problem with the logic though: You are assuming that the Dust had to be in her weapon.

While Winter definitely used Dust, it does not mean that said Dust was in her weapon at all. She was off in the background, hidden from sight, and she did not fight Weiss directly, she tested her via her dogs.

Winter could've just grabbed a pair of Dust crystals or vials, and used that for the Blizzard and the Snow-Waves. Said crystals/vials do not need to be the one in her weapon for Winter to have caused the Blizzard.