From Dark and Darker Wiki
Status Types
Most statuses have a status type of either Buff or Debuff.
Buff
Buffs are statuses that make their target stronger, like Cleric's Divine Strike
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Not all buffs have a blue icon, however, such as Fighter's Combo Attack
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If a Buff has a Duration, then this duration is affected by Buff Duration Bonus.
Debuff
Debuffs are statuses that make their target weaker or make them receive damage, like Wizard's Fireball
All debuffs have a red icon.
If a Debuff has a Duration, then this duration is affected by Debuff Duration Bonus.
Other
Other statuses include ones that are not designated as a Buff nor Debuff, meaning it is not affected by Buff Duration Bonus nor Debuff Duration Bonus.
This also includes Race statuses, like Elf
Source Types
A statuses' source is what applies the status.
Class
The status comes from a Class like Fighter, Wizard, etc. One example of this is Rogue's Hide.
Item
The status comes from an Item, like Weapons, Armors, or Utilities. One example of this is the Potion of Healing
Monster
The status comes from a Monster, like Skeleton Mage's Fireball burn
Other
The statuses' source is not yet designated. This includes statuses like Goblin Cave's Cave Collapse
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