What does Serena Bloodfeather reward?

Serena Bloodfeather gives a choice of Elegant Shortsword, Harpy Skinner, Zhovur Axe, 1,950 experience.

Where does Serena Bloodfeather start?

It was picked up in The Barrens.

Its level has not been recorded yet; it shows once a player accepts it with the addon running.

No. The quest exists in Classic Era as well.

World of Warcraft: Forever · quest

A quest in World of Warcraft: Forever in The Barrens and turned in to Darsok Swiftdagger. Recorded by 1 player running the addon.

Level, giver and objectives show once a player with the addon accepts the quest.

Item	Given	Item level	Vendor sell
Elegant Shortsword	as a choice	20	14s 84c
Harpy Skinner	as a choice	20	14s 36c
Zhovur Axe	as a choice	20	17s 89c

What does Serena Bloodfeather reward?: Serena Bloodfeather gives a choice of Elegant Shortsword, Harpy Skinner, Zhovur Axe, 1,950 experience.
Where does Serena Bloodfeather start?: It was picked up in The Barrens.
What level is Serena Bloodfeather?: Its level has not been recorded yet; it shows once a player accepts it with the addon running.
Is Serena Bloodfeather new in WoW Forever?: No. The quest exists in Classic Era as well.

Source: what players running the addon saw in the quest windows; the quest text itself stays in the game. Every quest seen · The Barrens