Step 1: tame griffin using Phlinger Phoo’s trap

Step 2: level griffin to 1200 stamina at least 5000 health

Step 3: go to rag near the the top right of the map

Step 4: use griffin dive to get in and out fast then go the red Terminal

Step 5: go to your favorite map

Step 6: use pig to heal and cryo it to change what it wants for imprint

Step 7: WAIT

Step 8: you have a Wyvern