The cape has the ability of the Ava's Alerter to retrieve arrows and the Ardougne cloak 4's ability to teleport the player to the East Ardougne monastery and the Ardougne farming patch, as well as the enhanced thieving abilities of the latter cape. The completionist cape also is considered a Fire cape for fighting Ice Strykewyrms. Like Clan Cloaks and the Max Cape, the colours of the cape can be customised by using the menu opened by right-clicking the cape.
Resembling to the Dungeoneering master cape, this cape leaves behind a trail of white smoke. The cape can then be upgraded after completing a list of requirements including 5000 Castle Wars games and a full statue of Dahmaroc in the player's house. The particles on the cape change to gold when upgraded, and the black dragon in the emote will become gold trimmed as well. However, the actions of the emote do not change between the two forms of completionist capes.
Trimmed: We'd pat you on the back, but this cape would get in the way.