Shadowslicer Riki first appeared as a quest and special boss in the Fallen Justice Raid Event, the first of the Dark Stigma story.
She become a standard boss during 4 Malice Canon raid events of the Dark Stigma story line as:
- End Boss of Event Quest 7 and 8
- Special 2x Damage Boss, 20 Minutes
Riki was an officer of the empire's Stigmal-elimination faction: the Lightholders. In the Divine Judgment Raid Event, she changed sides and became a staunch ally of the Hero. She featured on these cards: