Valve has just launched its first battle pass for Dota Underlords, which is its own version of the popular Auto Chess mod for Dota 2. Appropriately called Proto Pass (because it is a prototype battle pass), beta testers can access the content for free, in hopes that they will provide feedback to Valve as it works on a proper Season 1 Battle

Source: Hot Hardware – DOTA Underlords Free-to-Play Auto Chess Game Gets First Battle Pass