A little while ago, Riot Games announced a plethora of new projects that included Legends of Runeterra and two other mobile games. The strategy card battler Legends of Runeterra that is set in the League of Legends universe has had closed beta tests and a release window for it was announced recently for mobile. Today, the game has soft launched on the App Store and Google Play (as spotted by Killercow) in Singapore.
Legends of Runeterra is planned for full release on both PC and mobile in the first half of 2020. Check out the official website for the game here. Pre-registrations are live on Google Play (that URL will let you download it in Singapore) and the App Store page is also live for Singapore here. Have you tried Legends of Runeterra on PC yet?