Thank you for replies guys. Planets from the closest one to Sun-like star: -Super hot terrestial planet with super dense atmosphere with lava lakes and high volcanic activity. -Terrestial planet with sponge-like structure, tidally locked, one moon. -Gas giant with ring, numerous moons (Other question here, would it be possible - with sufficient technology - to harvest hydrogen and helium from gas giant's atmosphere?) -Earth-like planet with two moons, two large continents, mostly covered with ocean (I'm concerned about ocean's behaviour with two moons) -Cool terrestial planet, crust mostly composed from copper compounds (complete abstraction?) -System's dense asteroid ring. -Large ice-giant with handful of moons but with one large one (about 1/2 Earth's diameter). That moon would have surface temperatures above water's freezing point due to geothermal activity and giant's Kelvin-Helmholtz mechanism. @AbstractDreamer I'm making decent use of this freedom, but it annoys me how classical fantasy puts physics into complete disregard and explains everything with "Ancent Magic", "Mighty Forces" or "Primeval Evil". I want elves, dwarfs and griffins but with prosthetics, weak AIs, smartphones and common VTOL aircrafts. With actual explanation why humans and elves fight, why world is divided like it is and take my time to refine every detail. When I'll finish working on version in my native language I'll probably try to translate it into english, but for now there is still lots to do.