Dagger master

You have favored the dagger over all other weapons, whenever you use a dagger you gain the following benefits:

• Your critical hit range is increased by one (20 to 19 this stacks with the feat grappler rework and class features such as hexblades curse and improved critical)

• Whenever you deal sneak attack damage to a creature with a dagger, you deal an additional sneak attack die of damage (AKA 2d6 becomes 3d6 for example)