**Transformations.** Trick weapons are weapons that can be transformed into alternate forms and have different abilities depending on said form. **Proficiency.** To be proficient with a trick weapon, a character must be proficient with both states of the weapon. If a character isn't proficient with one of the forms of the weapon, they don't add their Proficiency Bonus to attack rolls made with that form of the weapon, as would be the case for not being proficient with a 'regular' weapon. **Usage.** A character needs to be proficient in at least one form of the weapon in order to use it and all its properties. > **Example** > For example the '[[Serpent Bladewhip]]' is a [[Whip]] in its Untransformed state and a [[Rapier]] in its Transformed state. If a character is Proficient with the whip but not the rapier, they can still access all the properties of the weapon, but when they attempt to use the rapier for attack rolls, they do not add their proficiency bonus **No Proficiency.** Due to the complexity of trick weapons, if a creature is not proficient with any of the forms of the weapon, they cannot use it in combat at all. They have Disadvantage on attack rolls made with the weapon, can only transform the weapon as an Action, and cannot use any special properties the weapon might have.