Horizon Walker enhancements

Universal enhancement tree for bow users. Planned for 2021 in the same release as the next classic pack. Probably before the fall.

Source:
 * https://www.twitch.tv/videos/839463825 (around 20:00)
 * Producer letter/February 2021



Tier One
Requires character level 1, 1 AP spent in tree

Tier Two
Requires character level 2, 5 APs spent in tree

Tier Three
Requires character level 3, 10 APs spent in tree

Tier Four
Requires character level 4, 20 APs spent in tree

Tier Five
Requires character level 12, 30 APs spent in tree