The curse mark is somewhat like "The Eight Gates" but you don't have to go through strenuous training and it doesn't cause nearly as much damage to the body of the user.
1.Cusre marks will be given out by a fuunjustus expert
2. The curse mark can be activated by choice or if you're starting to lose(or die). The point of the mark itself is to increase the power and abilities you already have and that's exactly what it does. Power boost. At level 1, your mark will last you until the end of the battle as it tends to take more control with the more chakra you lose.
3. Level 2 is a work in progress but there will be a separate.
Curse Mark Stat Booast
Level 1
Speed: 15
Stamina: 25
Strength: 25
Agility: 20
Physical Endurance: 25
Chakra Reserves: 25
Chakra Control: 25
Intelligence: 15
Level 2 will be coming soon