IS#4 END1: Ice-cold Image

Strategy:
Kill the saxophonists.
Do not overkill the first phase. Prepare the nuking squad after destroying most of the vine tiles. Once the boss reached half HP, start nuking the boss second phase and do it quick. Suzuran/Skadi Alter are good buffers and healers.
Block the right-side enemies at the top of the map to avoid the freeze-bomb drone.
Kill the exploding spiders at Shu's spot.