I used to play Anime Defenders but it gets pretty boring after you've gotten a couple good mythic units (units are the npcs you place down) because it's just grinding gems to get a secret unit (secret is the highest rarity) which takes forever unless you have a good computer and can run multiple instances of Roblox (when I played the best way to get gems is to do the same stage over and over again with around 5 accounts then trade all the gems you get from it to your main) I think the game is still pretty good tho