Golemagg the Incinerator

Item	Chance	Quantity
Essence of Earth	≈ 40%	1–2
Essence of Fire	≈ 40%	1–2
Sulfuron Ingot	≈ 37%
Core of Earth	≈ 30%	1–3
Heart of Fire	≈ 30%	1–3
Lava Core	≈ 14%
Narain's Scrying Goggles Quest item	≈ 1%
Quick Strike Ring	≈ 0.72%
Talisman of Ephemeral Power	≈ 0.72%
Formula: Enchant Weapon - Healing Power	≈ 0.45%
Formula: Enchant Weapon - Spell Power	≈ 0.45%
Pattern: Core Armor Kit	≈ 0.45%
Pattern: Core Felcloth Bag	≈ 0.45%
Pattern: Flarecore Wraps	≈ 0.45%
Plans: Elemental Sharpening Stone	≈ 0.45%
Recipe: Major Rejuvenation Potion	≈ 0.45%
Schematic: Biznicks 247x128 Accurascope	≈ 0.45%
Schematic: Core Marksman Rifle	≈ 0.45%
Schematic: Force Reactive Disk	≈ 0.45%

Drops and chances are estimates; not all have been confirmed in the current game.