Hi,

I killed voidwaken deer and got Source Orb, put it into Amulet with free Rune slot and got amulet that gives me Evasive Aura skill to use (required 1 source point). However the skill is always greyed out on my action bar and I have no idea how to use it! Is it bug or am I doing it wrong?

I have Source Point on my character, amulet equiped .

some skills require to be in combat to be used.
some require certain stats to be met.
or you just don't have enough ap.

if not that then it's bug.

Reequip it. Sometime, the skill is removed from your skill book and you have to reequip the necklace.

Very annoying bug.