Hayley and Klaus in “Unfinished Business”

Hayley

(looking at Elijah's neck) Is this rash a side effect of the witchy acid trip he's on?

Klaus

I haven't seen this since I was a child. Mikael would return home from battle more blindly temperamental than usual, and our mother would use the petals of a rare merlock orchid to put him to sleep. She would mend his mind with a spell, and then wake him with the roots of the same plant.