The objective of this skill is to balance the pvm for races that normally do less damage than warrior and sura.
Shamans/Ninjas/Mental Warrior and Magic Sura have higher percentage of Strong against Monsters .
As soon as you hit level 5 and learn your skills, you will get the passive from Monster Skill Passive
To start learning this passive skill you can read the following books Monster Manual I Monster Manual II Monster Manual III
With Monster Manual I you can learn the passive skill from 1 to M1
With Monster Manual II you can learn the passive skill from M1 to G1 You also need level 50
With Monster Manual III you can learn the passive skill from G1 to P You also need level 90
You can trade Books Chest in uriel for Monster Manuals

State	Body Warrior	Weapon Sura	Ninjas	Shamans	Mental Warrior	Magic Sura
1 Point	1	1	12	12	6	6
2 Point	2	2	14	14	7	7
3 Point	2	2	14	14	7	7
4 Point	2	2	14	14	7	7
5 Point	3	3	16	16	8	8
6 Point	3	3	16	16	9	9
7 Point	3	3	16	16	8	8
8 Point	4	4	18	18	9	9
9 Point	4	4	18	18	9	9
10 Point	4	4	18	18	9	9
11 Point	5	5	20	20	10	10
12 Point	5	5	20	20	10	10
13 Point	5	5	20	20	10	10
14 Point	6	6	22	22	11	11
15 Point	6	6	22	22	11	11
16 Point	6	6	22	22	11	11
17 Point	7	7	24	24	12	12
18 Point	7	7	24	24	12	12
19 Point	7	7	24	24	12	12
20 Point	8	8	26	26	13	13
M1	9	9	28	28	14	14
M2	9	9	28	28	14	14
M3	10	10	30	30	15	15
M4	10	10	30	30	15	15
M5	11	11	32	32	16	16
M6	11	11	32	32	16	16
M7	12	12	34	34	17	17
M8	12	12	34	34	17	17
M9	13	13	36	36	17	17
M10	13	13	36	36	18	18
G1	15	15	40	40	20	20
G2	15	15	40	40	20	20
G3	16	16	42	42	21	21
G4	16	16	42	42	21	21
G5	18	18	44	44	22	22
G6	18	18	44	44	22	22
G7	20	20	46	46	23	23
G8	20	20	46	46	23	23
G9	22	22	48	48	24	24
G10	22	22	48	48	24	24
P	25	25	54	54	27	27