as a collector the unit pool is the hook. roll for the meta units, evolve them, fill out the roster, and theres a genuine endgame maxing a full team to push the hardest content. the tower defense underneath is solid too. only reason its not a 5 is the banner luck, completion is gated behind rng and that stings when youre trying to log every unit. but its a mountain of content and i keep coming back. 4.