Holy Light
Hold down Holy Light to manifest a halo of light to disperse the Chaos Shard. Quickly press the button before being hit to perform a light parry that protects you from damage.
How to obtain
Go to the Holy Light tutorial location marked on the Paris Streets map, enter the trigger area, and complete the initial tutorial story sequence to unlock it. It will not be granted again if this tutorial has already been completed.
Backstory
Holy Light gifted by the Maid of Orléans will protect the blessed and drive away fragments of Chaos Shard.