Archer appeared in the prison as Demacia was putting the Blood Crawlers to work, they kept the prisoners in line just by their appearance alone. Once seeing this he created a whole new floor below this one for the Death Gorillas.
After the space was carved out he teleported there, Archer appeared in a massive open chamber where he started creating cages connected to walkways which would allow the sisters to inspect the prisoners.
Once that was done, he began tossing the Death Gorillas into the prison cells with little regard for their struggles. As the monsters realized their new confinement, they went wild, thrashing and clawing at the bars in a desperate bid for freedom.
Without hesitation, Archer used Mana Manipulation, slapping the creatures which forced them to behave. After that, he turned to the entrance and made his way out of the new prison.
