Sense The Unexpected

You are overly suspicious, and have a feeling someone is always watching. You will not be affected by surprise rounds, and thus you can roll a Dexterity Saving Throw with a DC of the DMs choice to see if you can dodge the enemy attack and make a retaliation attack with whatever weapon you may be holding (if unarmed, use unarmed strikes) with advantage. Only after that do you roll initiative. The Dexterity Saving Throw will have a default low of 10, and can be increased further based on the CR of the enemy compared to Player Level, as well as how many enemies there are. Cannot go higher than 20.