you must contact cyp directly to get it and there is no kit donor400 baisicly donor400 kit is every kit except for kit spawner and you have to individually do each kit and you get it every24 hours
You can get donor 250 at this link. Skyblock | Welcome Yet contact cyp for donor400, But i will list the perks for 250 anyway Make sure to log in with your exact username or the log-in wont work and nor will the purchase. Perks: Kit: 64 Redstone 512 Cobble 8 Iron Ingots Diamond picaxe 3x Diamonds 15 Grass 5 Sand The perks are on the website
We are also able to use every other donating kit level on the appropriate timer. The kits I can recall off hand that we get are: Donor250, Donor100, Donor50, Donor25, Donor10, Iron, and Wood.