Trick Weapon Master

The Drow Princess withdraws her umber hairpin and removes it's dull point to reveal a deadly poisonous thorn, empaling her mother's side to usurp her throne. An old Gnome builds himself a hefty mallet with a secret blade hidden beneath to strike away at his particularly swifter foes. Each relies on his or her own precision, mastery, and misdirection. To be capable of a trick weapons use requires a fighting spirit of, albeit dishonorable, but tactfully advantageous techniques. Enemies will be at your mercy when they underestimate the versatility of your wrath.

Trickery

You gain proficiency in Sleight of Hand. You also gain proficiency with two Trick Weapons of your choice, one Utility based and another Martially based.

There are two types of Trick Weapons:

-Utility Trick Weapons are the most deceptive of the two. Used to hide in plane sight, a Utility weapon serves either a dual purpose or merely disguises itself as a simple tool of no threat whatsoever. A quill pen could hide a slim dagger, a walking stick may harbor a retracting bladed whip, the loaf of bread my even house an explosive ooze. A master of the craft will see the possibilities are endless.

-Martial Trick Weapons serve as versatile tools of wicked swordplay or taunting footwork. An axe that extends and retracts reaching different damages and serving a multitude of ranges in battle, a longbow made from the blades of dual swords, perhaps even hammer that holds pockets of different harmful substances, like burning coals. Although very combat-centric, the most unusual of the weapons are also the most underestimated.

While in combat you may use a trick weapon as statistically detailed by your DM. If you are proficient with it, you may transform the weapon out of it's current state as a bonus action or a prepared reaction. (More Trick Weapon options to come)

Bow Blade

Martial Trick Weapon - A pair of dual swords, made to be two parts of one whole, come together as a longbow. When together they act as a ranged weapon of either long or short bow statistics, when apart they serve as short ranged blades, either dual daggers or short swords. The Damage is as stated by the weapon chart table in the players handbook. This weapon, only shortly after transforming (1 Turn), has the Finesse property.

Extending Weapon

Martial Trick Weapon - You gain proficiency in a specific extending weapon of either a spear, an axe, or a blade. An extending weapon is statistically at your DM's discretion in its first state in terms of range, damage, and wether or not it's versatile, but when transformed adds 5ft to its range and deals one damage dice lower than normal. (1d6 becomes 1d4) The DM is encouraged to weigh their own cost and benefit. These weapons, only shortly after transforming (1 Turn), have the Finesse property. 

Hidden Blade

Utility Trick Weapon - Statistically the blade acts as a dagger, and has the Finesse property.

Hidden Compartment

Utility Trick Weapon - A rare weapon to receive the Finesse property. Either housing small pockets of magic or toxins to strike your prey when they least suspect it, Hidden compartments can cause damage of all kinds and the victims will be none the wiser. Maybe slowly poison a king's soup one shake of salt at a time. Perhaps you could throw a bead of your neckless at the pesky Kobalt, freeze his legs off. Some tales even spread of a Dragonborn who asked folk of all manner to place their hands in his deathtrap of an "empty" cap.

Mechanically Adept

You gain proficiency in Tinker's Tools and two other Artisan's Tools of your choice. You can create and repair a Trick Weapon at half the time and cost. (DM's Discretion) Experimenting in the ways of trickery through mechanical construction has allowed for a level of adjustment that only you and a few select others may be able to understand. Your steady hands and puzzle solving mind allows for a carry-over ability you can use with other hobbies or pass-times as well.

Ace in the Hole

When using the transform technique of a Trick weapon in and out of combat, you can preform sneak attacks as detailed by the Rouge class, and you can gain advantage on the attack if the target has not seen the trick weapon transform before. The Sneak attack damage is 2d6 at level 7, 3d6 at level 10, 4d6 at level 15, and 5d6 at level 18. If a creature has seen the weapon transform a sneak attack in this manor cannot be preformed on them. Out of Combat this technique can be utilized as the true function of what a trick weapon is made for. A swift and unpredictable strike. In combat a sneak attack in this manor cannot be preformed on a creature that has already seen the trick weapon transform this way before unless it has an intelligence and or wisdom of 6 or below. (Probably this is more of a Joke)

Dance of Death

You can now transform the weapon as a free action during a set of attacks. You can also now make a (Dexterity) Slight of Hand check competed against your targets (Wisdom) Perception check. If you succeed you can perform multiple sneak attacks on the same target even if they have seen the weapon transform before. You and your target must do the check again every turn you decide to make the sneak attack, and you can only preform it once per turn. A fluid stream of attacks merciless and unpredictable in nature. The ability to confuse you enemy with movement alone is admirable but mechanics and physical prowess combined become quite deadly.

Overwhelming Slight

Upon a successful sneak attack with a trick weapon the target of this attack has disadvantage to make opportunity attacks against you for the remainder of your turn. (Like the mobile feat.) So disorienting is your strike, almost beguiling. Every maneuver you partake in leaves enemies dazed and confused. They begin to loose awareness of your space and their own.

Hands of Slight

You gain expertise in Slight of Hand meaning you double your proficiency. You gain proficiency in two more Trick weapons of your choice, Utility or Martial. Your precision and mastery of misdirection has surpassed all expectation. You know trick weaponry like the back of your hand and your versatility only grows.