Dark Priest

Dark Priest is a monster that is available on the server's database, but does not spawn anywhere. You cannot even summon him using a Dead Branch.

In contrary to popular belief, you can no longer obtain a Dark Priest Card from  OCA (Old Card Album). Gravity has removed the card from the OCA list. Although you can find it in ExperienceRO's database, there is no way to obtain it. Even RMS removed it from their OCA List

Card
Item ID: 4171

Name: Dark Priest Card

Description: Compounded On: Weapon
 * Add the 5% chance of decreasing enemy's SP amount by 10% when attacking.
 * [ Sage Class ] Gains 1 SP every time when doing physical attack on monsters.

Drop Rate: 10.00%