You can fight with boss every day only one time.
You cannot fight with boss eaven if you lose.
Any drop from boss have 3% chance.
You must complete the obligated boss of the tribe to get to the last boss.

Boss Name
Boss Level
Exp
Health
Loot
Zabuza Defender
50
75.000
10.000
Haku Defender
100
150.000
20.000
Kimimaro Defender
150
225.000
40.000
Orochimaru Defender
200
400.000
60.000
Yamato Defender
250
500.000
100.000
Danzo Defender
300
600.000
200.000
Kisame Defender
350
700.000
400.000
Hinata Defender
400
800.000
600.000
Neji Defender
450
900.000
800.000
Choji Defender
500
1.000.000
1.000.000
Menma Defender
550
1.100.000
1.200.000
Minato Defender
600
1.200.000
1.400.000
Nagato Defender
650
1.300.000
1.600.000
Gaaara Defender
700
1.400.000
1.800.000
Obito Defender
750
1.500.000
2.000.000
Shisui Defender
800
1.600.000
2.400.000
Itahci Defender
850
1.700.000
2.800.000
Madara Defender
900
1.800.000
3.200.000
Sasuke Defender
950
1.900.000
3.600.000
Kakashi Defender
1000
2.000.000
4.000.000