The Legendary item that Karna had obtained had a drop rate of 0.01% after clearing the nightmare mode of the event dungeon . However being the son of providence , he triggered that probability on the first try.
On average the dungeon took 12 days to clear , and the overall probability was 1 in 10,000 . Which meant that a regular party would need to raid this dungeon 10,000 times , which would take around 12,000 days or around 3 1/4 years time to get this item.
This was if a team was capable enough to clear the nightmare mode of the dungeon in the first place.
However the dungeon was an event dungeon available for a limited time , which meant that it would go away after a limited time of 3-5 months . Which made the odds of getting the item even more astronomically unprobable.
Hence it was safe to say that the elites were the only guild on the nothern continent to hold this game breaking legendary item.