There was a passive effect when equipping the Leviathan Armor in his previous life that he knew of. It was that each level of the glory effect would increase a certain amount of HP. Killing the enemy would obtain two levels of the glory effect, or assisting in killing the enemy would obtain one level of the glory effect. This glory effect could stack up to 20 levels.
Perhaps the world was different now.
[Card: Leviathan Armor]
[Type: Armor]
[Level: Divine Weapon]
[Description: Every enemy killed would gain glory for you, and every level of your glory will defend you against damage, so go and claim the glory that belongs to you!]
Without hesitation, he took the card and said to the old principal, "Principal, I want this card."
"Leviathan Armor? This equipment doesn't suit guardians very well... but I suppose you'll make sue!"