[Ideia/Request] Nydus Worms

[borgos912]

Hello, I saw this post on reddit (https://www.reddit.com/r/factorio/comme ... _worms_on/) talking about worms moving to attack you and bring bitters with it, and I was wondering how difficult it is to make something like that.

1. New enemy type: Tunneling Worm
2. Same range, damage, splash as a normal worm but with extra health.(adjustable in case you want the worms to be super tanky but with no attack)
3. It also functions as a double spawner(bitters and spitters) creating enemies inside your base(maybe with adjustable spawn rate according to evolution).
4. At first it would use the defense aspect of bases(https://wiki.factorio.com/Enemies#Defense), if it was left alive for some time(adjustable) it would transform in to a regular base.
5. To protect your base, you would need to pave it. With each tier of Worm needing a better ground tile(brick for medium, concrete for big, refined concrete for behemoth).
6. Have a option for 2 behaviors. In the first, tiles would block pathing through it like a wall. The second it would just block the worm from emerging in that area but not pathing, so to protect your whole base, all of it needs to be paved.
7. Have a option for 2 spawning behaviors. The first would spawn Nydus Worms like regular bitters. The second would change so that nest expansion, instead of making a new base, it spawns a Nydus Worm.
8. New Building: Seismograph
9. Function like a radar, it detects Nydus Worms moving towards your base within it's range and output a signal, so you can set up alarms.

How difficult would it be to create this mod? And is some kind modder willing to make it?