Name of the plugin you want: McDuels-2
Spigot Link: https://www.spigotmc.org/resources/mcduels-2-practice-pvp-pvp-bots-duels-1v1-2v2-3v3-koth-bedwars-kit-editor-1-8-1-16-5.42131/updates
Price: $10
How it would contribute towards the betterment of the community: It's one of the best duels plugin...