The strike was Broodhold on the Tangled Shore, and its Hive witch boss was In Anânh, Brood Queen.

Quick context

  • Location: Tangled Shore
  • Enemy mix: Fallen and Hive
  • Boss: In Anânh, Brood Queen, a Hive Wizard

Nearby candidates

  • The Hollowed Lair was also on the Tangled Shore, but its boss was The Fanatic , not a Hive witch.
  • Warden of Nothing was another Tangled Shore strike, with The Mad Warden as the boss.

So if you remember a Tangled Shore strike with a Hive witch boss, Broodhold is the one.