Backtrack through Border Watch in Rethramis and go to the Aquilok's 'Head' underground dungeon. This item is located in Lost Ark Boosting an area that is somewhat isolated and requires interaction via the lever.

After speaking to the guard, and then searching in the cave. You'll have to take down a cart that is hindering your move forward. The act will bring about an army of enemies, so get them out. When you're done, look in the alcove to your left and you'll spot an entry point for a lever. Engaging it will fall a nearby boulder that will open up a whole new zone on the map visitors to wander around.

Drop down and proceed towards the left side to locate a few Thornwalkers. Find them and search for an interactable object in the floor, just on the left side of a nearby torch. Once you interact with it, you will acquire a 499 year-old Mera Wine. You may also explore the hidden area to find Two Mokoko Seeds.

Should you dismantle your old gear or trade it in Lost Ark?

Becoming attached to your gear in Lost Ark isn't usually recommended because you'll need to replace your items with Buy Lost Ark Boosting more powerful ones as you go throughout the adventure.