TL;DW: Arena, Lee Sin & PvE Mode First-Look

Hey folks, Riot Brightmoon, Meddler, Cadmus, and ChooChooTrain back with another TL;DW of today's Dev Update:

• Arena's recent run was pretty successful, but play hours decreased over the course of the run.
• When Arena returns, it will have lobbies of 16 players per game.
• There will also be a new class of items: Prismatics, which completely alter the way you play Arena.
• You can also go big or go home by buying items from the Anvil (at a lower price, but much less reliably).
• There will be more info in the /dev blog next week!

• We're releasing a bullet heaven survivor PvE game mode during the mid-year event.
• We made champion-specific titles in the updated Champion Mastery system permanent.
• It will also be easier to get Mastery with the new system, since it will no longer factor in team performance.
• The updated system has a targeted release date of patch 14.10 on May 15.
• We released a dev blog on Lee Sin's ASU with more details about his process.

• The team has been working on gameplay clarity on some skins.
• We're targeting Lee Sin's release in patch 14.9 on May 1.
• Teemo's ASU is targeted for a release in patch 14.20.
• This year there will be a unique Victorious skin for each split.
• Don't forget to tune into MSI to see who punches their ticket to Worlds!

• The first split's skin is Victorious Kog'Maw.
• The second split's skin is Victorious Sona.
• If you unlock all three Victorious skins, you will receive a Victorious border for them all.
• You can learn more about this in a dev blog that's out today.