Strikes Introduction (Grimoire Card)

Strikes Introduction (Grimoire Card)
Information
Category	Activities
Subcategory	Strikes
Acquired by	???
Grimoire Score	0
Quote	"There are threats that must be faced with unfettered aggression. Are you ready?" -Commander Zavala
Description	Our enemies hide among our lost worlds, plotting to ensure our extinction. But the Vanguard keeps a vigilant watch on places where the creatures of the Darkness grow strongest, and seeks Guardians bold enough to join forces to face them.

Strikes Introduction is a Grimoire Card in the Activities category and Strikes subcategory. It can be obtained by ????