Lance

This weapon is meant to be used from horseback. As long as you are mounted, you may use this weapon in one hand without penalty. However, this weapon is unwieldy against enemies that are too close, and you have disadvantage on attack rolls against foes within 5ft while using this weapon, or while using this weapon on foot. This feature does not modify a weapon's damage die.

This weapon is meant to be used to deal greater damage to mounts that charge into them. Instead of taking the attack action or ready action, you may use your action to set your spear. When a mounted creature moves towards you and enters your reach, you may use your reaction to make an attack against its mount. This attack is automatically treated like a critical hit if it lands, regardless of the actual roll. If this kills the mount, the rider must make a DC13 Dex saving throw or be pinned beneath the mount when it collapses. 

This weapon is intended to be used on horseback, and is rather ill-designed for use otherwise. This weapon has the Unwieldy trait when not used while mounted, and while using this weapon while you have a -10 to movement speed the turn after you attack with it if you attack with it while not mounted. If it is a Range weapon with this trait, you cannot use it on a turn where you have moved.

This weapon adds 5 feet to your reach when you attack with it.