There are several large hoards of them to the north and the north east of Ogtinc. The drop rate is low Mabinogi Gold on them though, so it will take a little while to get all 4. Once done, return to Ogtinc.

You may want to get a few people with you to help make this go faster and if you have a big enough group you can do the escort. If you're going at this solo don't try the escort, you'll just fail it or spend a lot of time for little XP.

Off the top of my head, second Raptor Mastery quest and a Quest in Grom'Gol I think it is In Defense of Grom'Gol you have to kill the same type of raptors. And again with the raptors you will later need Raptor tusks or horns.

The last quest is to travel to the Sunken Temple and kill the dragon Morphaz and retrieve his blood. You do not return the blood to him though; instead you must find Greta Moss-hoof in Felwood.

The sunken temple is a hard instance for a group of all level 50's so you may have to wait a few levels to complete this part.