Vermin

Overview
The Vermin is a buffed version of the Familiar found in the Underworld. It has a 5% chance to replace regular Imps and Familiars. They steal mana on contact, just like familiars but steal all of the player's mana on contact and receive no magic damage. They can spawn anywhere in the Underworld (via five percent chance) but spawn more commonly in Crucibles (Random gen structures in the Underworld after The Wall of Steel is defeated and these starting being generated below the Underworld). Vermins also are attracted to dropped items laying on the ground and when they touch them, they disappear and can only be retrieved by killing the responsible Vermin. If a Vermin steals any mana from the player, then it boosts other enemies' attacks, debuffs (If enemy creatures inflict debuffs on the player) and ultimately enhances magic damage and power of any enemies that use magic weapons or cast spells.

Statistics

 * 300 Resists 21% of Physical Damage and is immune to Unholy Damage
 * 140 Damage
 * 26% Chance to double damage
 * Movement speed: Very Fast

Drops
70 Shadow Scales or Tissue Samples

Vermin's Mana Siphoner (10% Chance)

Vermin's Mana Storage (30% Chance)

10-75 Vermin Bombs

* Any stolen items

* Only if items were stolen. If not, then drops a random Pre-Hardmode common crafting material/component.