Striker
The striker rogue is proficient at taking advantage of weaknesses. Setting up more advantages creates a greater opportunity to strike. These rogues are patient, and look for opportunities to make vital strikes in the midst of battle, using their allies and the environment alike.
Precise Strikes
Starting at 3rd level, you can take advantage of a very vulnerable enemy. When you make a melee attack against a humanoid which is no more than one size larger than you and who you have two sources of sneak attack or more against, you may roll d8s in place of your d6s for your sneak attack.
Heightened Observance
Starting at 9th level, your Mortal Strikes ability extends to beasts as well.
Additionally, Mortal Strikes extends to any creature who has the bloodied condition (less than half their max hit points) or any creature type who you have previously observed bloodied.
For instance, if your party fought and killed a manticore, then going forward, your mortal strikes ability applies to all manticores.
Follow-Up Strike
Starting at 13th level, when you have made a successful sneak attack, as a bonus action you may make a single melee weapon attack with the same weapon. This attack has an expanded critical hit range equal to 20 minus the number of sources of sneak attack you have.
For instance, if you have two allies within 5 feet of the target and the target is blinded, your critical range becomes 17-20.
Lethal Strikes
Starting at 17th level, you become a master of exposing creatures’ weak points, using previous experience to make educated guesses as to the vulnerability of all creatures. Your Mortal Strikes ability can apply to any creature type and any creature size.
Additionally, upon learning this feature, the bloodied condition now become a source of sneak attack.
Finally, when you make a melee attack against a creature and you have five or more sources of sneak attack, you may roll d10s in place of d6s.