Kaido is not getting killed but this is of the off chance that he must be killed, now who do you think should be used to kill a weakened kaido that can't protect himself with coc in a pg 13 manga
1. the relatively fresh law who has being shown to decapitate people
or
2. zoro who is at death's door and has never decapitated any sentient being
1. the relatively fresh law who has being shown to decapitate people
or
2. zoro who is at death's door and has never decapitated any sentient being