User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-6050823-20130918214013/@comment-6050823-20130919025402

I just recently discovered something else. "Feral Wyvern Crystals". They are believed to be how Goa Magara and Shagaru Magara get their toxic abilitys and, it seems you may find them on Infected Monsters.