So I'm having a hard time coming up with a vestige for my Arcane Trickster. We have decided that it's a mask he always wears and can't seem to get off his face. Now the reason for this is still a work in progress... But I want to start building into it and bringing forth the dormant side of this mask.

He is an elf with a love of combat, the kind that always tries as hard as he can to get the sneak attack. He isn't big on roleplay, but getting better.

So far he has been pretty skillfull at using illusions in battle to his favor.

Tell me... What do you think this mask would do for him? Keep in mind this is a Vestige. A powerful item with 3 stages of power. This would be the first, the dormant state.