After conquer insane level, I started to check XMLs to find and tryitems that i never have.
So, I found Ashwake dragon, and tried it, tried to add trigger fear cause it's cool.
But I could never have done it, cause
<Attribute>UnlockUnitAbility</Attribute>
is not working with non-usable items.
I've checked it with "Boots of Stealth" which have same option.
Also, the option itself is not right, neither.
<GameModifier>
<ModType>Unit</ModType>
<Attribute>UnlockUnitAbility</Attribute>
<StrVal>MasterScout</StrVal> -> it's faction ability that makes no Movement penalty in Forests, Swamps, Hills or Rivers, but i suffered movement penalty when i tried.
<Provides>Monsters less likely to attack because they can't hear you.</Provides> -> this should be shealth, or stealthy option.
</GameModifier>
On the other hand, UnlockUnitAbility option works fine with usable items, like fortune scroll.
In Short,
Adding noncombat ability is impossible with non-usable Items, and the boots of stealth suffers same problem. So, right now, it is just def +2, dodge +5, ranged dodge +5, move +1 item. it's ok, but not just cool enough to be a "Rare".