Palace 2 and now (spoilers)sending the calling card to fight Madarame's shadow.
Palace is easier than the previous one so far or maybe I'm getting better.
Oh shit.. advice before going in?
It's been the boss that gave me the most trouble, but it's pretty doable if you know what you're doing.
Just bring a physical attacker like Yusuke and spam AoE physical attacks till only one part of the boss is left. Take that one out with magic.
Repeat accordingly and voilá.