Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.

You can use your Dexterity modifier instead of your Strength modifier on attack rolls using this melee weapon. You still calculate damage using Strength.

This weapon is attached to a length of rope or chain that allows you to retrieve it after it has left your hand. If you have a free hand (including if you've just thrown a two-handed tethered weapon and have a hand holding nothing but the weapon's tether), you can use an Interact action to pull the weapon back into your grasp after you have thrown it as a ranged attack or after it has been disarmed (unless it's being held by another creature).

You can throw this weapon as a ranged attack; it is a ranged weapon when thrown. You add your Strength modifier to damage as you would for a melee weapon. When this trait appears on a melee weapon, it also includes the range increment. Ranged weapons with this trait use the range increment in the weapon's Range entry.

A training weapon is designed to be used when training an animal to participate in combat by identifying the target for the animal to attack. Striking a creature with a training weapon gives your animal companion or your bonded animal a +1 circumstance bonus to its next attack roll against that target.