Help find the sword (Blood and Wine) (The Witcher 3: Wild Hunt)

Hello everyone! Came across a video where a dude shows you where to find manticore armor.
So, he was wearing a very cool, as for me, steel sword.
The fact is that it has a snake mark on the top, and such swords, as far as I know, can be found in chests on question marks, but I have already climbed the entire location and have not seen such a sword.
I ask for help from you, members of the forum, tell me the name of this sword, where to find it, or at least the id of this blade.
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