- During the mod system transition between Update 6 and Update 7, all of the previous mods were turned into Fusion Cores to be used in the Mods 2.0 system. During this conversion, all of a player's preexisting mods were turned into a random core between the rarity of Common 0/10 up to Rare 10/10. After the transition, Common Cores were maxed to 3/3, while Rare and Uncommon topped off at 5/5. Hotfix 14.0.9 renamed these cores as "Ancient Fusion Cores" and made available for trade through the Dojo trading post.
- Ancient fusion cores can currently only be obtained through trading with other players.
- Unlike Legendary Cores, Ancient Fusion Cores have no special function during the Fusion process.
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