Jsk Feats:Small Weapon Master

Subtle weapons should be felt, not seen. When you are wielding a light weapon with a damage die no higher than a d4, you gain the following benefits.
 * You make ability checks to conceal a weapon Effected by this feat with advantage.
 * When you make an Attack using a weapon Effected by this feat, you score a critical hit on a roll of 19 and 20.
 * When you take the Attack action and make an attack using a weapon Effected by this feat, you can make one additional attack using the same weapon as part of the same action. You can only benefit from this Effect once per turn.
 * When you take the Attack action and throw a weapon Effected by this feat, you can draw another weapon that would be Effected by this feat as part of the same action.
 * Throwing a weapon Effected by this feat at long range does not impose disadvantage on the attack roll.