Originally Posted by
ilostmahbucket
Blizzard assumes that you completed the quest Ashran Appearance (horde) or Ashran Appearance (alliance) to get the follower Vivianne who will give you a 100% chance to get Ulna.
If you failed this mission and didn't get Ulna, no sweat. Build a level 2 garrison, build a level 1 Inn, complete the weekly quest to get a new follower and select for Magic Debuff ability counters.
Granted, you did lose out on a chance to get an epic follower, but at least you can cover yourself for countering Magic Debuff (followers that counter this are rare-ish).