Dwarven Spear (5e Equipment)
From D&D Wiki
You gain a +1 bonus to attack and damage rolls made with this weapon. When dealing slashing or piercing damage with this weapon, you ignore any resistance against the type of damage dealt by this weapon. The thrown range of the spear, javelin or trident is decreased by 10 feet from normal range and 30 feet from long range due to to its heavy weight.