maxgamr 
Scarlett Fox just helped me discover the Twisted Root Artifact just before the 17,000 meter mark. I think I’m beginning to see a pattern here. Could it be that only the FIRST FOUR Temple Run 2 characters (Guy Dangerous, Scarlett Fox, Barry Bones, and Karma Lee) can uncover artifacts? (Someone please prove me wrong here from the little data I’ve collected thus far). And, the distance in discovering artifacts alternates between approximately 10,000 meters and 20,000 meters. Time will tell here… Have a look at the Twisted Root!
The blip in the data I have thus far is my run with Francisco Montoya. I had to get to nearly 30,000 meters, and the artifact he collected was a duplicate of one I already had. Not sure what that tells me at the moment…
I have only used Usain Bolt and have been able to get two different artifacts (Wings & Island) but it has been days since I got those lol
I have been changing characters and abilities for weeks now. I doubt that I will ever get the tenth mask! I have lots and lots of rings and a boat load of Christmas artifacts…got a wreath yesterday! Only playing the daily and weekly challenges now. About to abandoned this game.