What I need is very simple. I need a plugin that, when players type /sky, generates an island in the existing world. (custom schematic compatability if you can implement that). The islands will be organized in a grid with islands 60 blocks apart and of a random Y height that is randomized with a configurable range. Commands and permissions: /sky - makes an island for the player /sky remove - removes that player's island
Sounds to me like you are looking for something like skyblock. There are tons of plugins like this, such as this one.
Well, that's not exactly what I need; i'm trying to implement a sky faction game on my server but I want to stay with original factions plugin,