Every chest and monster that can drop Copper Button, with the drop chance in each zone and Gyldening Intensity. A range means the rate shifts with party size and map district.

Treasure chests

Locker

Normal (either zone)18.8%–24.6%Hallowgrove · Chaos14%–18.4%Brandrgarde · Cataclysm6.7%–8.9%

Handcart

Normal (either zone)18.8%–24.6%Hallowgrove · Chaos14%–18.4%Brandrgarde · Cataclysm6.7%–8.9%

Forge Bench

Normal (either zone)18.8%–24.6%Hallowgrove · Chaos14%–18.4%Brandrgarde · Cataclysm6.7%–8.9%

Bone Urn

Normal (either zone)18.8%–24.6%Hallowgrove · Chaos14%–18.4%Brandrgarde · Cataclysm6.7%–8.9%

Frenzied Wizard Jar

Hallowgrove · Chaos8.0%–20%Normal (either zone)7.7%–18.1%Brandrgarde · Cataclysm5.1%–13.4%

Withered Nest

Hallowgrove · Chaos14.9%–19.6%Brandrgarde · Cataclysm11%–14.5%Normal (either zone)5.6%–7.5%

Woodpile

Hallowgrove · Chaos14.9%–19.6%Brandrgarde · Cataclysm11%–14.5%Normal (either zone)5.6%–7.5%

Spirit Jar

Hallowgrove · Chaos14.9%–19.6%Brandrgarde · Cataclysm11%–14.5%Normal (either zone)5.6%–7.5%

Forge Furnace

Brandrgarde · Normal8.9%–11.8%

Jewelry Box

Normal (either zone)8.9%–11.8%

Iron Chest

Normal (either zone)6.1%–9.7%Hallowgrove · Chaos3.2%–6.5%Brandrgarde · Cataclysm2.2%–3.4%

The Exiled

Normal (either zone)2.5%–9.7%Hallowgrove · Chaos4.4%–8.2%Brandrgarde · Cataclysm2.2%–6.2%

Military Chest

Normal (either zone)6.5%–9.7%Hallowgrove · Chaos4.4%–6.5%Brandrgarde · Cataclysm2.2%–3.4%

Shipwreck

Hallowgrove · Normal6.5%–9.7%Hallowgrove · Chaos4.4%–6.5%

Forgotten Tomb

Normal (either zone)6.5%–9.7%Hallowgrove · Chaos4.4%–6.5%Brandrgarde · Cataclysm2.2%–3.4%

Gift of Fate

Normal (either zone)2.2%–9.7%Hallowgrove · Chaos1.4%–8.2%Brandrgarde · Cataclysm2.2%–6.2%

Civilian Chest

Hallowgrove · Chaos5.5%–8.2%Brandrgarde · Cataclysm4.2%–6.2%Normal (either zone)2.5%–3.8%

Goods

Hallowgrove · Chaos1.4%–8.2%Brandrgarde · Cataclysm4.2%–6.2%Normal (either zone)2.5%–4.6%

Timber Chest

Brandrgarde · Cataclysm4.2%–6.2%Brandrgarde · Normal2.5%–3.8%

Gilded Chest

Normal (either zone)3.4%–5.1%

Silver Chest

Normal (either zone)3.1%–4.6%Hallowgrove · Chaos1.4%–2.0%

Copper Chest

Normal (either zone)2.2%–3.4%

Nobleman’s Chest

Normal (either zone)2.2%–3.3%

Mistchaser's Satchel

Hallowgrove · Chaos3.3%Brandrgarde · Cataclysm2.1%Normal (either zone)2.1%

Monsters

Gylden Corroded Soldier, Berserker, Strawer Chief, Fungus Matron +3 more

Normal (either zone)2.8%–5.6%Hallowgrove · Chaos0.97%–2.0%

Corroded Soldier, Sacred Chamber Priest, Corroded Guard, Corroded Archer +9 more

Brandrgarde · Cataclysm2.5%–4.4%Hallowgrove · Chaos2.0%–3.5%Normal (either zone)0.79%–1.4%

Flesheater, Tyrannical Executioner, Twinblade Warrior Statue, Soulgnawer

Normal (either zone)2.8%–4.1%

Frenzied Wizard

Normal (either zone)0.74%–3.8%Hallowgrove · Chaos0.26%–1.3%

Golden Woodling

Normal (either zone)2.8%–3.8%Hallowgrove · Chaos0.99%–1.4%

Parading Corpse, Elite Corroded Soldier, Elite Corroded Priest, Elite Corroded Archer +8 more

Brandrgarde · Cataclysm1.2%–3.5%Normal (either zone)1.3%–3.4%Hallowgrove · Chaos1.2%–3.0%

Rates are the chance per chest opened or monster looted. Low rolls also build up the drop guarantee, which upgrades a future drop to Legendary once it fills.