Spring: Growing plants, possibly from the cosmos in the Tower, rain in social spaces and in the field, beehives around the Tower to throw and cause chaos and kill Guardians but have a chance of stinging the thrower, lightning around the system with potential to hit Guardians, etc. Summer: Plants bloom and give blessings and high-light gear and the like, rain, hives, animals around the Tower and the potential to adopt one of them similar to growing a plant, domesticating felines and being able to use them in combat(Traveler would give them light, you earn armour), lightning, etc. Autumn: Dead leaves and twigs around the Tower, making forts with them(not visible to others when the builder leaves Tower), etc. Winter: Snowballs around the Tower to throw, snow forts in it, domesticating canines with the same mechanics as felines, etc. Put suggestions in comments below, thank you for reading.