Toughness

Not to be confused with Damage reduction.

Toughness is a property of monsters that multiplicatively affects the damage they take. Increased toughness causes monsters to take less damage while reduced toughness causes them to take more damage.

Calculation

The damage taken by the monster based on their toughness is calculated as follows, rounded to the nearest whole number:

$\color [rgb]{0.6392156862745098,0.5529411764705883,0.42745098039215684}{\text{Relative Damage Taken}}=1-{\dfrac {100\%}{100\%+{\text{Total Increased Toughness }}\%}}$

Example Toughness and Damage Taken

Toughness modifier	Relative Toughness	% damage taken
50% reduced Toughness	50%	100% more
Base Toughness	100%	—
100% increased Toughness	200%	50% less
200% increased Toughness	300%	67% less
6566% increased Toughness	6666%	98% less
6567% increased Toughness	6667%	99% less
19899% increased Toughness	19999%	99% less
19900% increased Toughness	20000%	100% less

(6567-19899)% increased Toughness is the maximum possible value for Toughness that permits the monster to take damage. At 19900% increased Toughness or above, the monster has 100% less damage taken, effectively granting damage immunity.

Known sources

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• Essence monster modifiers
• Wisps
• Titanic ScarabTitanic ScarabStack Size: 20
  Limit: 1Unique Monsters have 2% increased Toughness, Damage, Rarity and Quantity of items dropped per 1% increased Pack Size of AreaWhat power lies in a name?Can be used in a personal Map Device to add modifiers to a Map.
• Titanic Scarab of TreasuresTitanic Scarab of TreasuresStack Size: 20
  Limit: 3Unique Monsters in Area have 2 additional Rewards
  Unique Monsters in Area have 30% increased ToughnessGreed is a trap of the mind.Can be used in a personal Map Device to add modifiers to a Map.
• Divination Scarab of PilferingDivination Scarab of PilferingStack Size: 20
  Limit: 1Divination Cards which drop in Area are stolen by a Final Map Boss
  That Final Map Boss becomes more Difficult and deals
  increased Damage the more Divination Cards they have stolen
  That Final Map Boss duplicates all stolen Divination Cards when defeatedIf you do not seize your fate, someone else will.Can be used in a personal Map Device to add modifiers to a Map.
• Monsters from Verisium ore deposit (depends on channel time)

Version history

Version	Changes
3.25.0	Introduced to the game. Essences now grant increased Toughness instead of Life to the Monster they are affecting, and grant a small amount of increase Item Rarity and Item Quantity to the Monster for each Essence affecting them.