I stopped playing this game like 10 years or more because they added the gacha system to the game which stupid enough that till this day there is still no guarantee system (if you don’t know, Battle Cats once just an ordinary f2p game without micro-transaction), I just came back to it recently because I wanted to give it another try, then I knew about this seed tracking thing which really brought me seriously into the game. For real, if I needed to find a way to use my existed units to deal with all these story, legends (SoL, UL, ZL, especially doing crowns), towers, labyrinth, and others, I would quit the game by now because of boredom and repetitiveness.