Besides the common ability to use some of the system with permission from their master, each seal had its own special ability.
Rather than the seal itself having special abilities, the Demon King's daughters who received the seals each had their own special powers. Whether from their species or individually cultivated power, at least the power possessed by the woman called 'Lucifer' rather than the seal was special.
'Revival'.
More precisely, distribution of pain. If someone with a soul bond died, it was an ability to save the contractor by splitting the pain between two people.
'My unique ability that only Father and I know about.'
This ability too unique compared to other seals had already been used by several masters, but eventually ended up passing to Halphas.
That power had been used. Lucifer had to endure the pain alone, collapsed in the summoning circle.
"Hngh, hrrngh...!"
