Here's the clue:
2-Travellers (maybe Markos) Tessa made TOS (the other side) when she was a travelller ancient time ago... long story, so maybe travellers could control it (maybe Markos... again)
3- mmm Angel/Phantom/Dark Spirit/Thor son of Odin/The Olyphus idk... just name your poison
And what the impact for next ep.... ??? like omg... Katherine's spirit is till out there, or Bonnie can get her magic back, Markos is Nadia's Father, new Doppelganger (like an army)..
so get your fingers on and type your thoughts down... :) Happy Friday btw