Soulreaver Sacrifice

With the Cardia Map, you can acquire new equipment. However, there is no longer a need for Merges, so what will you do with your Soulreaver equipment? Will it become useless?
Fear not, as it will not be rendered useless. Once you reach Royal Level 15, you can offer up your equipment at [?????]X in Cardia. Depending on its quality, you will receive a Power-Up for both your Damage and HP equipment. If you are able to obtain the High-Power-Up, you will gain access to the Trance Mode, which grants you incredible power. By dealing or receiving damage, you can activate this mode. Note that you can activate both the Damage and HP Power-Up simultaneously.