If you mean a skill starting with the word soul, in Talisman Online, there are Soul Rocking, Soul Shield, and Soul Lost. Soul Rocking and Soul Shield are skills that can be acquired with the Assist talisman Theurgy Bell. Soul Lost is a skill that can be acquired with any of the Dagger Weapon Talismans.
If you mean the skills associated with your soul (starting at level 10), you need to complete rounds in the Competitive Arena to level up your soul. Your soul can only provide 1 skill wich is HP increase.