To earn the Thorn Usurper accolade, you must complete the third Tree of Thorns Respecification Trial.

• Prior to Issue 20, you could do any of the Tree of Thorns trials and receive this badge the third time the character chose Respecification as a reward.
• A previous version of this badge had alternate text before claiming the respec: "Your appearance may change, but your villainous heart stays the same. You've undergone three respecs."