It's sad that you can only play them 1-3 times a day without paying.
For me, they're the most interactive missions with visible risks and rewards.
It's the only times I have to do manual battle because the AI can't handle the additional mechanics.
It's not brute force with stats, the RNG spawns make you think of a strategy based on the board state.
If you mess up, you know how and what you missed.
I wish there will be more quests like these. I open up the game, do these daily events.
Then the rest of the day is basically waiting for energy, doing autobattles for loot and event points.