In Raid : Shadow Legends, Dungeon Challenges 3.5 asks me to "Place a Block Debuffs buff on a Champion or use a skill that removes Debuffs while beating Stage 7 of the Void Keep". I have used (Knight Revenant) "Guardian" with a skill of "Prayer" ("Places a [Block Debuffs] buff and a [Counterattack] buff on this Champion for 2 turns"), yet the game does not seem to register it. I have tried it 3 times, using the "Prayer" skill each time, with no effect on the Challenge. Am I misreading the Challenge? Or is this a bug?