[Tusjecht]

Originally Posted by Awrya

The Destiny is an arc.
Disaster Armour is a combiniation/fusion of The Destiny and the rare item Starcaster (I think it was called), the sword that dropped after killing the acid monster that kept killing Saffron Blossom, thus the Disaster Armour is not an arc.

Spoiler for History of the Destiny:

That monster is Jormungand. Attacks using acid and tentacles, only shows up in stages like Purgatory, Rotting Forest, Swamp. OHKO-ed by Chrome Falcon with the Destiny on him, dropped rare sword Star Caster. Incarnate System + Destiny + Star Caster = Disaster Armour.

Later Haru separated it into Destiny and Star Caster again, they're both free from any influence from Beast, Haru's name for the personality contained in the armour. So now the Destiny is an arc again but he sealed it in the house Falcon and Blossom bought for good measure.