You need to listen!

The griffons. They weren’t here a week ago. You’re a reporter, you can spread the truth better than I can. You can do so much more but you need the information.

We still don’t know for sure how they got here but we speculate it was during the final day of the war when the Archmages got together and released the Halcyon surge. As for how long we notice an increase in rift energy a week or so back and that's when.