Idle Champions of the Forgotten Realms

the first Free Play is unlocked after completing any of the main adventures that appear after the two tutorials. you must beat AREA 50 before resetting for it to count as a "completion". you could manually grind out this goal by resetting at 51 each time, or just let it come through natural progression. one of the most beneficial ways to progress through this game is by repeatedly resetting Free Plays, either earning favor, gems, or both. so you will very likely earn this along the way to earning other ones.

Building on the technique and video that Gunflame shared in their guide, the grind for free plays has been made even easier by taking advantage of the new Modron Automation, added to the Xbox version in July 2020.

Once you have unlocked at least two champions per bench slot through events, evergreen champions, and time gates, you can start the "Split the Party" quest. After completing that one-time quest, it unlocks the Modron core options for you to enable on your parties. You need to configure the Modron pipe mini-game such that it flows through the automation tube (it will make more sense once you unlock it) and then you can set the core to autoplay the free plays for you. You must have accrued enough favor within whatever campaign you're running free play on and have a minimum of two familiars unlocked as it will use one to do click damage and the other familiar to level up your click damage as you collect gold. Then you simply set it to restart once it beats level 50 (the minimum level for completing a Free Play) and rinse and repeat. Without even having to touch my console at all, it's completing one free play roughly every hour. It runs a bit slower in offline mode as it doesn't collect gold as quickly, so you can leave your Xbox on and just let it idle complete (it is an idle game after all). This way, you don't need to pop on to your Xbox to keep it cycling to the next free play run as it does it for you.

While the Modron Automation works even if the game is offline, it appears that for Xbox to track it correctly, the game must be online with your system on. You'll still complete this faster than without Automation as this can keep launching new Free Play runs throughout the night as long as your system stays on. Also, the game doesn't care if your controller is plugged in or on once it is running; it will still make progress without logging you out.

Note: You will need to launch the game and open the Modron Core interface at least once a week to keep the automation running. They don't want players running it run forever offline. However, you likely will get your 250 Free Play runs completed within 2 weeks, if not much sooner.