You can use this plugin to Toggle PvP, Build for players, slowly tpall players. This plugin is mainly developed for Events.

You need the PlaceHolderAPI plugin to make placeholders work

Placeholders:
%eventsystemcore_alive% - Shows how many players are left alive

Commands:
/mutechat
/revive <player>
/event pvp - toggles PvP
/event build - toggles Build
/event reload - reloads the config of the plugin
/event slowtpall - Tps players, but slowly
/event mutechat - mutes chat
/event hide - hides all players without permission "Event.seePlayers"
/event alivelist - shows alive players
/event revive <player> - revives specified player
/event reviveall - revives all players in the server
/event tpalive - tps all alive players to your location

Permissions:
/event - event.toggle
Buliding / Breaking while it's turned off - Event.BuildBypass
MuteChat bypass - Event.MuteChatBypass
See players (while hide is true) - Event.seePlayers
Using blocked commands - Event.useBlockedCommands