A Chaotic Crossover: How Did Rhongomyniad End Up in My Hands?

[FGO + Ordinary Protagonist + Wild Transmigration + Fake Noble Phantasm + A Lot of Lives]

Why is Rhongomyniad in my hands? System: The Host has been equipped with the Fake Shining Spear of the End. Now go start your wild transmigration adventure! Wait, why is it fake? Am I really not worthy of the real thing?

System: Rhongomyniad, the Holy Lance. It must have six of its twelve restraints released to unleash its full power. It seems to trigger a special condition when used against stars. Using the Holy Lance without the Dragon Factor may result in immediate death. A distant descendant of a certain King Arthur.

Fine. Suddenly, I think the imitation is pretty great. Staying alive comes first!! (Whether you have a brain or not makes no difference.)