What does Hezrul Bloodmark reward?

Hezrul Bloodmark gives Bounty Hunter's Ring outright.

Where does Hezrul Bloodmark 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. Recorded by 1 player running the addon.

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

Item	Given	Item level	Vendor sell
Bounty Hunter's Ring	outright	20	4s 3c

What does Hezrul Bloodmark reward?: Hezrul Bloodmark gives Bounty Hunter's Ring outright.
Where does Hezrul Bloodmark start?: It was picked up in The Barrens.
What level is Hezrul Bloodmark?: Its level has not been recorded yet; it shows once a player accepts it with the addon running.
Is Hezrul Bloodmark 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