The Adder of Strife

Weapon profile:
• Dagger form: 1d4 piercing damage
• Spear form: 1d6 piercing damage
• add +2 to attack and damage rolls
On an attack roll critical success:
{bull} The Adder of Strife unleashes a wave of screams
dealing 4d8 necrotic damage to all creatures
within 15 feet of the target (that can hear).