Donova Snowden is a level 50 quest giver located next to the hot spring south west across the road from the Frostfire Hot Springs in the contested territory of Winterspring.
She starts the following quests:
[52] The Videre Elixir
[52] Meet at the Grave
[56] Toxic Horrors
[56] Threat of the Winterfall
[56] Falling to Corruption
[56] Strange Sources
[57] Winterfall Runners
[59] High Chief Winterfall
[59] Words of the High Chief
See List of Winterspring NPCs.