X damage will be added to the initial damage of your next If «Purge the Wicked»: Purge the Wicked; otherwise: Shadow Word: Pain.
The Catharstick is full.
20% of all damage that you take is stored in the Catharstick. The initial damage of your next If «Purge the Wicked»: Purge the Wicked; otherwise: Shadow Word: Pain deals this stored damage to your target.