A pocketmine plugin, that will let players get head by killing players and redeem rewards from the head
You can mostly setup everything in the config.yml file
The rewards will work according to the opponent money, that will be calculated by a percentage you can edit in config money-percent option to setup the percentage you want.
You can change reduce-money from config to rather enable or disable reducing money from the opponent who's head you are redeeming
Thanks to @Xenophilicy and @HyperFlareMC for helping me