Talk:Cronus/@comment-7664147-20130824031201/@comment-11641616-20130825070544

Under notes. The pattern drops the first time you kill the boss for each frame, then you have a less of a chance each time to get it to drop. This was added because people would speed run and farm the pattern and sell it for easy credits pre update 7.8. Your best bet, if you want a 100% chance at the drop, is to make/purchase a frame and go kill him. Or, just keep farming.