Ninja Spy enhancements

Tier One
Requires: Basic Ninja Training, Monk Level 1

Tier Two
Requires Monk Level 2, 5 APs spent on tree

Tier Three
Requires Monk Level 3, 10 APs spent on tree

Tier Four
Requires Monk Level 4, 20 APs spent on tree

Tier Five
Requires Monk Level 5, Character Level 12, 30 APs spent in tree