Before the LaW update, the Pure Dark symbol was often mistaken for the Pure Metal symbol due to the color-parts Black and Grey.
It was the big prize in "Carnival Games" if you had the Pure Dragon, from Sep.13 to Sep.16.
This Dragon is the most powerful dark dragon.
All Hybrid Pure Dragons have their secondary element's third strongest attack as their second attack but this dragon has the second-weakest of it's element which is Leech. (Like Pure Terra's second attack is the third strongest Terra attack, which is Tumble Weed) Pure Dark's second attack should be Ghost Cloud.
It can be regarded as a part of the Multi-Headed collection.
It is the only dragon with The Grim Reaper as it's 4th primary attack.
The original Dark Dragon had acid powers but this dragon has acid+flame(shown in attacking animation)