Turn earn their trust and take them out from the inside.
With how close she was to him it's taking longer then he thought to find out who got her killed
Ever heard of backstabbing? Get close enough to them, get them nice and comfortable around you to let down their guard, then shove a knife in their back. I highly doubt he'd be able to get close to them any other way.
Killing thousands of civilians to avenge a girl who despises violence wow so smart of him
Lol,
We never said he was smart..
Only loyal... plus in his brain those people also forsaked his sister
(His brain be twisted)
How is fighting for the royal family he despises REVENGE FOR THE GIRL WHO WAS DECAPITATED BY THEM ?