How about this . The Harpoon of the Lonely Canopy , which can be wielded as a Javelin or as an improvised weapon . It has finesse and can also be fired as ammunition from a harpoon launcher , a heavy crossbow , or light ballista . While embedded in a target and for 6 seconds after it is removed or has dealt damage to a creature , the harpoon magically weighs down the creature . Flight distance is reduced to a third and walking and swim distance is reduced by 15 ft . In addition , targets impaled are forced to land at the end of each round or fall towards the ground as if it didn ' t have flying . While holding the harpoon , you can summon a ring bound to it , after focusing for a minute on doing so . This causes the ring to disappear and reform at a target location within reach . Wearing the ring allows you to summon the spear to you from anywhere , over a minute . You can move and take actions during this time , and the process will wait for you to have a free hand before the harpoon is summoned . The harpoon grants the wearer of its ring resistances equal to the target ' s immunities and resistances , for as long as the harpoon remains embedded in the enemy and for 6 seconds after the creature has taken damage , harpoon is removed , or the creature dies . The harpoon is nearly impossible to remove once it has impaled a creature due to barbs along the edge , and is intended to be recalled out of a creature ' s corpse using the ring . Only throwing the harpoon causes it to become embedded in the target . Attacking a hard target such as a golem or dragon scales with a thrown attack is done with advantage and deals 1 d 6 extra Thunder damage