There are no obvious traps on the sword. If you had a Detect Magic spell you could check it for enchantments without touching it, but I'll assume you go ahead and pick it up.
As you do, heat immediately spreads from your hand throughout the rest of your body. You no longer feel the ice-cold air of the stone chamber; it's like you are standing before a warm hearthfire.
The runes on the sword are similar to those on the map you took from Fyespon, and the general style of the sword's decorations reminds you of that mural in another room of this complex.
Here is a better look at the runes on the sword:
And here is Fyespon's map again:
Gregor tries to move the table so it stands across the door, but he'll need help from someone stronger to get that huge piece of stone furniture moving.
Remus: Harry... I'm a werewolf.
Harry: Are you fucking serious?
Remus: Well yes, but I don't see how that applies here.