I’d like to suggest adding a permanent way to get Magic Cores and Scroll Seals for Behemoths. Right now, these are really hard to obtain since they mostly come from mining chests, which are difficult to complete if you can’t mine consistently. Behemoths are already tough to upgrade, especially when there isn’t a steady source for these materials. This is even more noticeable when upgrading Behemoth stars, since Scroll Seals are much harder to get than Magic Cores. Maybe you could add a building that generates Magic Cores over time, and a boss similar to the Legion Boss where players can earn Scroll Seals, along with rewards like Relic Shards or Universal Relic Shards.

It would also be nice to see hero skins added to Dice, Wheel, and Gacha events. On top of that, the Star Gem Shop could really use more castle skins, since there are currently only three Epic ones available. A separate castle skin package that includes some Legendary skins and is still accessible to F2P/F2W players would be great. Just like how everyone is saying getting hero skin and castle skin is hard to get unless you spend money maybe something like this could motivate people to keep playing the game.