Angry Spellbook

Antimagic Vulnerability. The spellbook immediately perishes within the area of an Antimagic Field. If targeted by dispel magic, the spellbook must succeed on a Constitution saving throw against the caster's spell save DC or be destroyed.

False Appearance. While the spellbook remains motionless, it is indistinguishable from a normal book.

Water Susceptibility. For each 5 feet the spellbook moves in water, or for every gallon of water splashed on it it takes 1 necrotic damage, not subject to resistance or immunity.

Enchanted Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) slashing damage and 3 (1d6) fire damage.

Spell Mimicry (Recharge 5-6). The spellbook unleashes a thin sheet of flames in a 15-foot cone. Each creature in that area must succeed on a DC 12 Dexterity saving throw, taking 10 (3d6) fire damage on a failed save, or half as much on a succesful one.

Spell Repository. The spellbook flips its pages to find a more suitable spell as a bonus action, whenever it does, it may rerol to see whether Spell Mimicry recharges. It may choose from the following spells, it's Spell Mimicry instead casts that spell at 1st level with charisma as the spellbooks spellcasting ability and the damage type of the spell replaces the fire damage of the enchanted bite: Burning Hands, Guiding Bolt, Ice Knife, Inflict Wounds and Magic Missile.