At the start of each Boss Turn, put one Boss Counter on this. Each opposing player sends an Accessory they control to Oblivion. If they don't, they lose health equal to the number of Boss Counters on this.
Whenever a card is sent to Oblivion, put one Boss Counter on this.
When the players advance, flip this.
Skull: Whenever a Minion is defeated, send all Clash cards that defeated it to Oblivion.