Even when carefully planning out your pulls in Tower of Fantasy’sSpecial Order gacha, it’s inevitable for you to end up with duplicate Simulacra. Luckily, you may use these dupes to make your weapons stronger by amping up their base stats and unlocking passives.

What to do with duplicate weapons and Simulacra in Tower of Fantasy?

Duplicate Simulacra turn intoFusion Coresspecific to their associated weapons. For instance, Echo’s weapon is the Thunderous Halberd. If you pull a duplicate Eco in the gacha, you’ll get a Thunderous Halberd Fusion Core. This can be used to advance your existing Thunderous Halberdup to six times.

Related:How to clear a Joint Operation in Tower of Fantasy

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How to use Fusion Cores to advance weapons in Tower of Fantasy

To do this, open themenuby clicking the ESC button on PC or the honeycomb icon on the upper right of the screen for mobile. SelectWeapons. On the lefthand panel, selectWarehouse,and choose the weapon you want to advance, then clickUpgradeon the bottom right of the screen. On the Upgrade page, selectAdvancementon the lefthand panel to use your Fusion Cores.

It costsone Fusion Corespecific to the weapon you’re advancing and some Gold to make one advancement. you’re able to view the stat increase and additional passive on the right of the screen to see what changes your weapon will go through. Each advancement will add a star to your weapon, and it can only have a max of six.

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Passive bonuses stack, so the more dupes you have, the stronger your weapon will be. However, this isn’t necessary for non-competitive gameplay. If you stay away from PvP, you don’t need to aim to six-star your weapons.

Check out our guide onHow to claim a free SSR in the Tower of Fantasy Starpath Navigation eventto get a powerful weapon for free.