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Frank had already summoned his Dark Knight Troops to Gaia just now, bringing Zero and Nezhit leading a group of stealthy assassins! Some were alive, and others were highly specialized Undead, but all of them worked together for the same purpose, search and find the hideout of the Black Eyes!
After he killed these thugs, he extracted info from their souls and made them guide the Undead led by Zero and Nezhit, as they researched the entire city at night while searching for the area where they were hiding.
When they finally broke into the place, they found it was almost completely empty, some random guards were there and they got killed quickly, and the rest was just a lot of monster pets that were being trafficked elsewhere, and a lot of monster parts and materials left behind, the boss was nowhere to be seen.
