Skyspears
Skyspears are objects of unknown purpose created by the Progenitors.
They landed on five pre-FTL inhabited planets (Earth, Centauri IV, Kymellia II, Lotaria, and Wraithworld) approximately 5,000 years ago. The Kree science teams dispatched to study them nicknamed them Skyspears, for their long thin shape.
The spears were found to contain an unknown material, which the Kree named Primagen, which had mutagenic properties. Experimentation with the material lead to the creation of the Universal Inhumans, and the mutagenic materials which grant them their powers.
By calculating the tragectories taken by the spears, the Royal Inhuman Expidition was able to trace their point of origin as the God-Garden of the Progenitors.