This plugin add the /nightvision on your server, for activate the nightvision you can type /nightvisison or /nv, for disable it retype in chat /nightvision or /nv. Remember that this is a Skript plugin (.sk) (sorry if i don't speak english very well)
/nightvision command (Skript) is a free Minecraft Java mod. Compatible with Minecraft 1.21. Downloaded 161 times (via Spigot). Download it and open it directly in the game.