Arcane is a Netflix original series, and as such, it is hosted exclusively on their platform.
If you don't have a Netflix account, there are a few legitimate ways you might still be able to watch: 1. Shared Accounts arcane season 2 episode 2 free
Access requires an active plan. Plans typically start at around $6.99/month for the "Standard with Ads" tier. Get Ready to Dive Back into Runeterra: A