How to get ancient sparks in lol?

To obtain Ancient Sparks, you just need to buy them. The store has reintroduced the option to purchase larger amounts of RP (similar to what they did for the release of the Hall of Legends Ahri Faker skin). However, the cost per roll isn't explicitly mentioned—it seems to be 400 RP

Yeah, you can grind 'em through event missions or special challenges, but it’s slow. Sometimes they show up in limited modes or the shop if you’re tryna skip the grind

That's exactly how I do it, but like the guy above said - just grinding takes way too much time

I appreciate my time so I buy them, grinding is for poor ones xD