If you allow the invasion of shadows, you'll soon be swallowed by the darkness.
Trigger:
Stand
[CONT](RC/GC) Generation Break 1 Darkness (This ability is active if cards have been put into your soul during this turn) :If the number of cards in your soul is ten or more, this unit gets [Power]+5000/[Shield]+5000.
[AUTO](GC):When an attack did not hit, you may put this unit into your soul.