Ugh. Have enough dust for like 2.5 legendaries. Problem is the legendaries I need and want don't necessarily synergize with each other. Dr. Boom is great, but I feel like I can skip him. So then next up is like Black Knight and Alexstraza, but they work in completely different deck archetypes. Thinking about getting Alex and the required epics (~3) for freeze mage, then IDK what. If I get Grom and Alex, I'd still be missing Baron, Harrison, and Boom for control warrior. Could get Cenarius since I've been playing a lot of druid, but I think he's easily subbed out for Ysera or Kel'Thuzad.
Tough decision. Though I think Alex might be for sure since I'd finally be able to freeze mage, since she's critical for that.