Magic Items

An arrow of slaying is a magic weapon meant to slay a particular kind of creature. Some are more focused than others; for example, there are both arrows of dragon slaying and arrows of blue dragon slaying. If a creature belonging to the type, race, or group associated with an arrow of slaying takes damage from the arrow, the creature must make a DC 17 Constitution saving throw, taking an extra 6d10 piercing damage on a failed save, or half as much extra damage on a successful one.
Once an arrow of slaying deals its extra damage to a creature, it becomes a nonmagical arrow. This item can be found in the Dungeon Master’s Guide.

This ancient longbow’s staff is fashioned from a thick, gnarled piece of yew and polished to a lustrous shine. The weapon (whose name means Shadowbreaker in Elvish) was once wielded by a legendary elven warrior
You gain a +1 bonus to attack and damage rolls made with this magic weapon—which can also be used as a quarterstaff. By whispering the bow’s name and firing an arrow at a point you can see within 60 feet, you can use an action to cast faerie fire (save DC 15). Once used, this property of the bow can’t be used again until the following dawn.

A description of this item can be found in the Dungeon Master’s Guide. Rather than appearing as a prism like a normal ioun stone of its type, however, this purple gem is cut like a coin, with a face on each side. One is an elf woman whose long hair has a ruby tint, and the other is an older dwarf in a helm bearing the symbol of the dwarf god Clangeddin Silverbeard. In darkness, one can see ghostly shapes trailing after the coin-like jewel as it moves. When a spell is cast into the stone, the caster hears a male and female voice arguing. When a spell is unleashed from it, the same voices are heard chanting in unison by the user. Anyone attuned to this item receives to +1 bonus on Charisma (Persuasion) checks to resolve conflict or calm emotions. Research indicates this item was known as the Peacemaker’s Coin in the old dwarf kingdom of Roldilar, where it belonged to the human mage and dwarf ally Beldossan the Short.