I had a glimpse of scene in my head from X of Swords:
Magik seems to have the upper hand in her duel, but we suddenly see her from behind, run through, the enemy's sword coming out her back.
We cut up to Satur-9s balcony, with Illyana in the Empresses' clothes looking down at Satur-9 in black leather gear, disemboweled.
"Well, isn't that special?" Magik says, looking sad and sly, and as glam as Sinister.