Colonel Zerran

Item	Chance	Quantity
Armored Chitin	≈ 35%	1–2
Ancient Armor Fragment	≈ 23%	1–2
Fury of the Forgotten Swarm	≈ 13%
Scarab Coffer Key	≈ 5.5%
Bone Scarab	≈ 1%
Bronze Scarab	≈ 1%
Clay Scarab	≈ 1%
Crystal Scarab	≈ 1%
Gold Scarab	≈ 1%
Ivory Scarab	≈ 1%
Silver Scarab	≈ 1%
Stone Scarab	≈ 1%
Alabaster Idol	≈ 0.5%
Amber Idol	≈ 0.5%
Azure Idol	≈ 0.5%
Jasper Idol	≈ 0.5%
Lambent Idol	≈ 0.5%
Obsidian Idol	≈ 0.5%
Onyx Idol	≈ 0.5%
Vermillion Idol	≈ 0.5%
Pattern: Felcloth Robe	≈ 0.1%
Pattern: Felcloth Hood	≈ 0.05%
Pattern: Runic Leather Pants	≈ 0.05%
Plans: Radiant Leggings	≈ 0.05%
Plans: Thorium Leggings	≈ 0.05%

Drops and chances are estimates; not all have been confirmed in the current game. 174 rarer world drops are not listed.