Vindicator Corin is a level 19 quest giver located at Vindicator's Rest in the draenei territory of Bloodmyst Isle.
She starts the following quests:
[18] Oh, the Tangled Webs They Weave- [19] Fouled Water Spirits
- [18-20+] Clearing the Way (Group)
See List of Bloodmyst Isle NPCs.