You wrap yourself in anti-reality — not invisible, but irrelevant. You are simply not ‘there’ and cannot be sensed in any way. Attacks, spells or abilities cannot be used against you until you have had your action phase.
In your action phase, you seemling step out of nothingness in a swirl of dark matter giving you a +5 to your attack.
If your attack is successful, the target will be frightened of you.
If you are successful on your next attack, the target will be frightened of you and will only attack you if cornered. Otherwise the target will try to stay as far away from you while still being able to attack your allieds.
The fear will last as long as you concentrate.
Use this spell defensively against attacks before your own action phase. If you cast it against an attack directed at you, it will be an opposite roll between the attack and your roll in this spell.