Assassinate

As a bonus action, if an enemy cannot see you, you can Assassinate that enemy. Choose a weapon and make an attack roll with advantage. If it hits, the enemy takes bonus damage equal to 10 per level of the hostile creature plus your proficiency bonus plus your DEX mod multiplied by 7. If the enemy is not dead, you can use the dash action, but everything else is slower than normal. You can take 4 actions there.