Lvl	Atk	Chance	MP	Duration (Secs)
1	3-4	1%	45	3
2	3-4	1%	46	3
3	3-4	2%	47	3
4	3-4	2%	48	3
5	4-5	3%	49	3
6	4-5	3%	50	4
7	4-5	4%	51	4
8	4-5	4%	52	4
9	4-5	5%	53	4
10	4-5	5%	54	4
11	5-6	6%	56	5
12	5-6	6%	58	5
13	5-6	7%	60	5
14	5-6	7%	62	5
15	6-7	8%	64	5
16	6-7	8%	66	6
17	6-7	9%	68	6
18	6-7	9%	70	6
19	7-8	10%	72	6
20	7-8	12%	74	6

Shooting four arrows without fail. Chance of causing blindness.