Talk:Engulfing Darkness - Novalis/@comment-91.117.78.182-20171223162234/@comment-28089742-20171223162834

For every card in the game, at their top right there will be a "?" blue button. Click on it and check if there's any feeders for the specific card. If there's none, that's mean they can only level up their CD by using Harpy or their own dupes.