(The four-character title highlights the protagonist’s nature as a “filthy seed” while hinting at a thousand-year cycle of tribulation, preserving an epic, fantastical feel.)
400-word outline:
① Flower Spirit’s Tribulation: A thousand-year-old lavender spirit fails to survive the ascension lightning tribulation, and the donkey-like Life and Death System captures her soul. To gather her shattered floral spirit, she is forced to bind herself to a [Filthy Seed Symbiote] and complete missions in ten dying worlds.
② The Corpse-Ear Rot: Her first stop, [Mud-Pit Farming], casts her as a widow who starves to death. The corpse-ear seeds forced on her by the System mutate inside her, and their vines slaughter everyone in Huai Mountain Village. Zhang the Widow’s grief over her son’s death fuses with the corpse ears, detonating the Ten-Thousand-Soul Furnace in a dried-up well. She escapes with half a grain of the venomous Filthy Seed.
③ Filthy Cultivation Across Ten Worlds: She travels through cyberpunk, beast dens, embroidery workshops, apocalyptic wastelands, deep seas, brothels, insect nests, spirit coffins, pixel worlds, and thorn-filled realms. Each mission catalyzes a new mutation in the Filthy Seed: bursting tear ducts grow neon pus crystals; a soul-devouring crown entwines with life-eating thorns; a fungal palace conceives and bears purple goiter-like fruit; a puppet throne brands her with soul-devouring marks… The price of reclaiming the fragments of her floral spirit is having the Filthy Seed take root deep in her soul.
④ Purification and Rebirth: At her final stop, [Frozen Wasteland Thunder Sprout], she faces the remnants of the lightning tribulation. The Filthy Seed, wrapped in the corruption of ten lifetimes, detonates the System. Yet she sees the frozen remains of a snowstorm-struck swan and its dead chick. Using the Filthy Seed as her brush and purified bones as her ink, she inscribes the celestial text “Purity and Filth in Symbiosis” in the interstellar court. Her skeletal wings shed every trace of corruption, and flower seeds sprout anew at the tips of her feathers.
⑤ Cultivating Wings Across the Cosmic Sea: Wherever her wings pass, the sea of filth becomes frozen soil, and lavender blooms among the thorns. With a brush made from a filthy bone feather, she sails through the stars, pasting fungal membranes across the event horizon of a black hole and tempering the gears of reincarnation into a monument pointing home. At last, she uses frozen wasteland thunder slag as her seal and claims the universe as her own, pure and unsullied