Reference

Forest Mark

The order these unlock in has not been recorded yet, so they are listed as they appear in the source rather than drawn as a tree.

Effect	Max level	CP at max
For each Forest hero deployed, increases the HP of all Forest heroes in the team	Lv 10	175,000
For each Forest hero deployed, increases the ATK of all Forest heroes in the team	Lv 10	175,000
For each Forest hero deployed, increases the DEF of all Forest heroes in the team	Lv 10	175,000
For each Forest hero deployed, increases the damage dealt by all Forest heroes in the team	Lv 5	90,000
Increases Forest Hero Troop Capacity	Lv 5	90,000
Increases Forest Hero HP	Lv 10	175,000
Increases Forest Hero ATK	Lv 10	175,000
Increases Forest Hero DEF	Lv 10	175,000
DMG Dealt by Forest Heroes Increase	Lv 5	90,000
Forest heroes gain additional DMG Reduction in battle	Lv 10	175,000
For each Forest hero deployed, increases the HP of all Forest heroes in the team	Lv 10	175,000
For each Forest hero deployed, increases the ATK of all Forest heroes in the team	Lv 10	175,000
For each Forest hero deployed, increases the DEF of all Forest heroes in the team	Lv 10	175,000
For each Forest hero deployed, increases the damage dealt by all Forest heroes in the team	Lv 5	90,000
Increases Forest Hero Troop Capacity	Lv 5	90,000
Increases Forest Hero HP	Lv 10	175,000
Increases Forest Hero ATK	Lv 10	175,000
Increases Forest Hero DEF	Lv 10	175,000
DMG Dealt by Forest Heroes Increase	Lv 5	90,000
Forest heroes gain additional DMG Reduction in battle	Lv 10	175,000

Fully levelled, this category is worth 2,990,000 CP.