He doesn't have a bag anymore, but he does have pockets, so. Sure, why not, he'll also pick up the shiny gemstones and whatnot while he's looking. And he will be looking in one of those piles, over there.
While he's seen angelic weapons before, usually in use for their intended purpose, he's never actually gone and directly touched one. Still, there's a bit of an... aura... to this pile of rubble right here, of warmth and sunlight and certainty and of a good deed done. It's subtle and tricky to pick out, but in the gloom of this broken and forgotten reliquary of the past, it's enough to work from. Once he's on the right track, it's pretty easy to follow, and soon enough, one of his fingers brushes against something that feels like... hope. Hidden from the world, waiting for its time to shine, because the last wielder of it couldn't manage to bear the torch any longer. This being strange magic bullshit, he's not clear on the particulars, but... he thinks the last one to hold this weapon was in a lot of trouble. Up against something terrible, and losing. And instead of letting this little light darken forever, it was hidden, so that one day, someone else could pick it up. In context, that someone is him. The sword comes smoothly out of the rubble and into his hand like a pet that's been kept waiting for far too long, and in a way, it kind of is. How long has this poor, beautiful sword been stuck down here, irrelevant, just waiting for someone that understands what it's about? He doesn't know.
What he does know is that there is now a bit of a light show. A literal one. Golden glow of Heaven upon him or, uh, something. A celebration of at last, someone who gets it, someone who can go on with my mission. It is the first time this place has seen sunlight in a long, long time.