Won! Golem's Manastone - Abandoned Stonemason Town Exploration Codex - Throne and Liberty

After talking to the Golem Crafter, kill a Giant Crystal Scorpion and collect the Flawless Crystal in Throne and Liberty. Then go to the Secret Auction and speak to the Gatekeeper there.

Now you can join the auction. Several items are offered here. You can bid on all of them, but you only need the Golem's Manastone. Make sure that you are the last to bid here. The auctioneer will count the seconds before it ends.

Then deliver the Manastone to the Golem Crafter in Throne and Liberty.

As a reward for completing Won! Golem's Manastone in Throne and Liberty, we received 8 Recovery Crystals, 4 Quality Armor Growthstones, 8 Quality Polished Crystals, 1 Rare Weapon Growthstone, 6 Rare Polished Crystals, 105.296 EXP, and 20.453 gold.