From publisher blurb:
A useful handbook containing level 3 spell's variants and new components to empower each spell.
Ampoule of Positive Energy Plane’s matter
Baba Yaga’s lock of hair
Bark of a Dryad
Claw of a Wyvern
Clod of the Abyss
Dried eye of a Beholder
Dried tongue of a Frost Salamander
Eye of a Nothic
Flask of Blink Dog’s essence
Flask of an Air Elemental’s essence
Flask of an Earth Elemental’s essence
Flask of a Fey’s essence
Flask of a Fire Elemental’s essence
Flask of Elemental Plane of Air’s matter
Flask of Ethereal Plane’s matter
Flask of Powder of a Vampire
Flower of a Vampire Rose
Hag Eye
Heartgem of a Clay Golem
Heartgem of a Xorn
Holy Relic
Magic powder of a Fey
Philosopher’s Stone
Powder of Gelatinous Cube
Poison gland of a Troglodyte
Scale of a Bronze Dragon
Specimen of Modron
Tooth of a Flameskull
Unholy Relic
Vine of a Hangman Tree
Some monsters are not present in the Monster Manual. Inside the handbook you will find the link to a page with the monster's stats.