Destiny Knight Romance

You were raised as one of Wengins Kingdom’s knights.
The Kingdom is destroyed one day by an invading kingdom.
Four knights, Baldrake, Alfredo, Saddam and Ketra, were killed in the attack.
An old sage appeared before you when you were at your wit’s end and tells you, “Use the Guiding Iron Armor to raise the four knights from the dead. That is the first step to reviving the kingdom.”
Just what is the Guiding Iron Armor?
Can you restore the kingdom to its former glory?

[Source: Google Play]