Just a quick question. My Chaos Terminator Lord has a Kai Gun and a lightning claw. With the Kai Gun gone, what could i best say it represents with the latest codex?

Tzeentch Demon Weapon.

Or a Doombolt/Bolt of Change psychic power if you field him as a Sorceror.

but I'd rather stick with the Demon Weapon.

If your lord has the mark of tzeentch then that demon weapon (the deathscreamer I think) is the cloesest thing to a Kai Gun. if you don't have that mark, just make it a combi weapon.

Okay, sucks they dropped the Kai Gun.
Thanks for the feedback guys! ^_^