Place yer bets! which spell will Miles use to kill Lexi?

Will it be scary illusions that will guide Lexi to the highest tower, then proceed to toss him down?

Will it be some sort of trap, Exploding right in his face?

Will Miles tell Lexi betrayed and provide some evidence, thus leaving Lexi (and us) hanging?

Will he stab him?

Will he poison him?

What do you think?