Blizzard has released updated dev notes for this week’s Dragonflight PTR build, including a number of user interface and accessibility updates! Alongside new toggles and keybinding options, the iconic silver dragon border for rare mobs has been replaced with a new unit frame icon.
Rare mobs feature the skull icon, but no longer have dragon frame art.
Rare elite mobs will continue to feature the gold dragon, as well as the new skull icon.