It's (understandably) not the most focused on reaction, but it seems like Strickler has the most idea what is happening at the end of episode 10. Which given how long he's been around makes sense.
Even if Strickler himself wasn’t there at the battle of killahead or before that, I feel like Merlin was known among the changelings for screwing over his apprentices, which would make sense, as Morgana was his apprentice and he cut off her freaking hand
Someone brought up an interesting theory about Arthur being the first trollhunter, and Merlin turned him into a troll for it (if someone knows who made that theory, let me know and I’ll link it). With that theory in mind, its very easy to see how Strickler realized what was going on during ep 10.













