• Toxic Tolerance - He'll want you to be poisoned by Venomhide Ravasaur blood 20 times. This is easy enough as all you need to do is get poisoned by the Ravasaurs. However, if you are at max level, it's probably best to try and fight them unarmed and maybe even without any gear on. Some have complained that even unarmed the raptors were dying too fast - try using a low dps weapon if unarmed doesn't work.
• Venomhide Eggs - Bring 4 Venomhide Ravasaur Eggs to Mor'vek in the southeast part of the Marshlands. This is even easier than the previous quest. Around the same area of the Ravasaurs there will be eggs scattered. Just pick up 4!
• They Grow Up So Fast - Return 20 Venomhide Baby Teeth, the Venomhide Hatchling(Provided), 20 Runecloth, 20 Rugged Leather, and 80 gold to Mor'vek in the southeastern part of the Marshlands in Un'Goro Crater. This will take you at least 20 days to complete. The Venomhide Hatchling will offer you a daily quest everyday - but you only get one out of the possible 4! When you complete the quest each day, he will give you a Venomhide Baby Tooth. Below are the dailies he offers.

Dailies