Lightning lane

[Transplanter]

So I haven’t been to WDW is 5 or 6 years. I am assuming I have to buy a multi pass lane every day for each park (doing all 4). It looks like I can book up to 3 attractions or 1 big attraction. Is this at each individual park or just 3 and I’m done?

How much are they. Disney doesn’t list them on their site

Thank you