So yesterday I finally got my hands on the last Widl Artefact and I made a video showing where to get all ten.
Wild Artefact list 1. AF005 Bresha Ruins - autoget as part of tutorial 2. AF200 Oerba - check the ledge NW from the big tree in middle of the map, need moogle throwing ability 3. AF300 Sunleth Waterscape - when riding the beast from N to S, look on your left to spot Wild Artefact suspended in air, need moogle throwing 4. AF??? Archylte Steppe - extreme W, down on ledge in the ravine with moogle throwing 5. AF??? Seredipity - buy Wild Artefact for about 10000 coins (or 7500 if you have Haggler) 6. AF200 Augusta Tower - on F50, middle walkway, in plain sight 7. AF700 Dying World - E side, examine the Oracle Drive before the monument, return after you complete Episode 5 8. AF300 Bresha Ruins - do the "Iridium Ring" quest 9. AF4XX Academy - Alley in SE corner, concealed, need Moogle Hunt 10. AF100 Yaschas Massif - complete all 4 requests for red spheres, and then solve the Temporal Rift that appears in NE part of the map
If words aren't enough, here's the video. http://www.youtube.com/watch?v=cmGpZTAq5KA
The first complete English guide to Final Fantasy XIII-2 is here! http://www.gamefaqs.com/ps3/619315-final-fantasy-xiii-2/faqs/63553