Base creature values. Events, world settings, difficulty and loot bonuses can change an encounter.

a mutated bat
Creature resistance values; world limits may adjust them. Negative values indicate a weakness.
Invisibility
Base chance per roll, not a guaranteed reward. Bonuses, world multipliers and boss participation change the result. Charged items use their own quantities. Container contents also require the container to drop.
gold coin · 1–130 · 92.5%
heavily rusted armor · 1 · 12.53%
rusted armor · 1–2 · 12.53%
gilded buckler · 1 · 7.76%
thorn spear · 1 · 7.26%
star herb · 1 · 5.06%
bat wing · 1–2 · 4.9%
mutated bat ear · 1 · 4.9%
energy ring · 1 · 0.99%
black pearl · 1–3 · 0.72%
small amethyst · 1–2 · 0.5%
brass sword · 1 · 0.11%
starlight hat · 1 · 0.08%
the abyssbone buckler · 1 · 0.07%