Most Wanted card (abyssal demons) is a possible reward from the Rush of Blood Distraction and Diversion. The chance of winning a card is amount of waves defeated/20 on your weekly run. The card increases the chances of obtaining a unique drop from abyssal demons. It has 100 charges and loses a charge for every abyssal demon kill. You can check how many charges your card has left by right clicking your card and choosing 'check charges'. When elite Tirannwn tasks are completed, there is a chance that a charge won't be used.
When every charge is used up, the card will disintegrate. When the card rerolls for a unique drop, and the unique drop is received, it will consume extra charges for that kill. The affected items are: