Sorarth
Took about 3 runs of this length before my 300 acc Artak with Bambus +50% Acc buff and a +70 Acc Lead to finally apply the burn...if I ended up killing it where it would respawn I would restart the run. Such an annoying fight where it will remove your buffs every 3 turns but the removal gets speed up by if it applies freeze increases its turn meter and then will block your buffs and then dec your acc. Where you have sometimes a 1 turn window.
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