TEXT: Companion'
  s 
  Vault
  Ten 
  rare 
  relics 
  to 
  augment 
  animal 
  companions 
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  Within this document you will find a list of ten magic 
  items designed specifically for rangers'
   animal compan-
  ions. The entries provide descriptions of the items, how 
  they are given to the companions, and the mechanical ef-
  fects of each item. Each of the items is meant to work as an 
  adventure seed, as well; how did the bugbear obtain a vial 
  of dragon'
  s blood? What did the seedy merchant do to get 
  the greymoss?
  All of the items require attunement, however the way 
  the items are bonded to the animal are unique. The ranger 
  spends a short rest attuning to the item before giving the 
  item to the animal companion, however the item counts to-
  ward the animal'
  s, and not the ranger'
  s, allotment of at-
  tuned items. 
  Items 
  by 
  Rarity
  Rarity
  Item
  Common
  Cetusian Conch
  Common
  Jumping Shoes
  Uncommon
  Blanket of Dimness
  Uncommon
  Graymoss Tendrils
  Uncommon
  Llewyrrian Blinders
  Rare
  Dragon's Blood
  Rare
  Glittering Ribbons
  Rare
  Tears of Akadi
  Very Rare
  Bonding Amulets
  Legendary
  Rod of the Purple Sun
  MAGIC I
  TEMS A-Z
  Blanket of Dimness
  Wondrous item, uncommon (requires attunement)
  The Blanket is woven from the fur of displacer beasts. It is 
  difficult to make out the distinct shape of this  gray mantle,
  as if your eyes are bleary whenever you look directly at it.
  If your animal companion is wearing the blanket, as 
  an action you may command the blanket to use its special 
  quality. The blanket casts the Blur spell upon the animal 
  wearing it for a duration of 1 minute. This property can'
  t be
  used again until after the next dusk.
  Bonding Amulets
  Wondrous item, very rare (requires attunement)
  These aren'
  t found, they simply appear around a ranger 
  and their companion'
  s necks once they display a genuine 
  unity of character. The amulets are clay coins and bear no 
  adornment, their simplicity belying their power.
  While you and your animal companion wear the bond-
  ing amulets, if the animal companion is alive and within 
  50 feet of you, at the end of each short rest you may spend 
  your hit dice to heal your animal companion and the ani-
  mal companion may spend its hit dice to heal you.
  Cetusian Conch
  Wondrous item, common (requires attunement)
  The Cetusian Conch is a large spiraled shell. Its outer sur-
  face is mottled green and blue and its interior is a deep 
  purple. The shell is made by large, semi-intelligent mol-
  lusks that are only found in the depths of the Lake of Drag-
  ons.
  If the conch is crushed into a paste and fed to an ani-
  mal companion, it allows the animal to breathe water per-
  manently. 
  Dragon'
  s Blood
  Wondrous item, rare (requires attunement)
  A tiny ruby bottle with a brush cap contains a small 
  amount of dragon'
  s blood.
  If the blood is painted onto the claws, horns, beak, or 
  similar appendage of your animal companion, you may 
  permanently treat attacks made with those parts as magi-
  cal. In addition, damage dealt by the affected body part 
  permanently gains the following damage type, based on 
  the type of dragon that the blood came from:
  Dragon Color
  Damage Type
  Black
  Acid
  Blue
  Lightning
  Green
  Poison
  Red
  Fire
  White
  Cold
  Glittering Ribbons 
  Wondrous item, rare (requires attunement)
  These are small, multicolored ribbons with a distracting 
  metallic sheen. Each ribbon is embroidered with a gold 
  nugget, the symbol of Garl Glittergold.
  Once you weave the ribbons into your animal compan-
  ion'
  s fur or feathers, you may use an action to have the rib-
  bons cast the Confusion spell as if expending a 6th level spell
  slot. The area of effect is centered upon your animal com-
  panion but does not effect your animal companion. The 
  save DC is equal to 8 + your  proficiency bonus + either 
  your companion'
  s Strength or Dexterity bonus (your 
  choice). This property can'
  t be used again until after a long 
  rest.
  Graymoss Tendrils
  Wondrous item, uncommon (requires attunement)
  These are thin black filaments of a peculiar moss, coiled 
  within a coin-sized bag. Graymoss is only found growing 
  around sacrificial altars in Yuan-Ti temples.
  Once you weave the tendrils into the fur or feathers of 
  your animal companion, your companion becomes 
  wreathed in a smoke that matches the colors of your envi-
  ronment. This grants Advantage on Dexterity (Stealth) 
  checks made by the animal companion.
  
  Jumping Shoes
  Wondrous item, common (requires attunement)
  These small, enchanted rubber patches are distilled from 
  the latex of a Felsul tree. The latex must be drawn from the 
  tree after it is cut down on a moonless night.  
  If they are applied to the feet of an animal companion 
  using tree sap, the animal companion may permanently 
  double its long jump and high jump distances.
  Llewyrrian Blinders
  Wondrous item, uncommon (requires attunement)
  These are enchanted blinders crafted by the warriors of the
  Llewyrr to calm their animal companions in the heat of 
  battle.
  Once you place these over your animal companion'
  s 
  eyes, they gain Advantage on all saves against becoming 
  frightened, charmed, or petrified.
  Rod of the Purple Sun
  Wondrous item, legendary (requires attunement)
  This branding rod is made of an unknown oily metal that 
  causes a feeling of revulsion when it is held. The head is 
  shaped like Cyric'
  s burning sun motif and its metal is tint-
  ed purple.
  Upon branding your animal companion the rod liqui-
  fies and flows into the brand. From this point on, at the 
  start of each combat encounter your animal companion 
  descends into madness. For the remainder of the combat, 
  your companion will always attack on its turn as if you 
  had commanded it to attack. You do not need to spend an 
  action to command it to attack. It will always target the 
  nearest creature, moving to the target by the shortest route
  necessary. If there are two creatures that are equidistant 
  from the animal companion, it will choose a target at ran-
  dom. 
  Your animal companion gains an additional bonus to 
  damage rolls equal to half your level. Whenever your com-
  panion deals damage to its target, you may choose to have 
  your animal companion perform one of the following:
  •
  Mighty Sweep: The animal companion swings at 
  the target and another creature within 5 feet of the
  target. If the original attack roll would hit the sec-
  ond creature, the second creature takes half the 
  damage inflicted on the initial target. 
  •
  Daunting Roar: The target must make a Wisdom 
  saving throw. On a failed save, it is frightened of 
  the animal companion until the end of your com-
  panion'
  s next turn
  •
  Unbalancing Strike: The target must make a Dex-
  terity saving throw. On a failed save, the target is 
  knocked prone.
  The Save DC for Daunting Roar and Unbalancing 
  Strike is equal to 8 + your proficiency bonus + either the 
  animal companion'
  s Strength or Dexterity bonus 
  (whichever is greater).
  Once combat ends, if your animal companion attacked
  a party member while it was maddened, your animal 
  companion must make a Wisdom saving throw against a 
  DC equal to the highest amount of damage it inflicted on 
  any party member in one round. If it fails the saving throw,
  it will abandon you and flee into the wilderness.
  Curse. Once an animal companion is branded by 
  this item, it must always go mad in combat. The brand can 
  only be removed by a remove curse spell or similar.
  Tears of Akadi
  Wondrous item, rare (requires attunement)
  This is a perfectly spherical globule of crystal blue liquid, 
  the actual tears of the primordial Akadi. It has no contain-
  er, but stays in its form if it is handled gently. 
  If your animal companion drinks the tears, it'
  s Intelli-
  gence permanently increases to 7 (if it wasn'
  t higher al-
  ready) and it permanently gains the ability to speak Com-
  mon. 
  
SOURCE: textdata/thevault/Dungeons & Dragons [multi]/5th Edition (5e)/3rd Party/DMsGuild/Freshrad Games - Companion's Vault.pdf