Derived Attributes

A Derived Attribute is any attribute that is derived from one of the primary Attributes (or Linked Attributes). These often govern a character's health or mental fortitude.

Hit Dice
Hit Dice (HD) represent a character's health, and their ability to withstand injury. When a character is reduced to 0 HD (typically through injury in combat), the character is killed.

Hit Dice are calculated by the character's Vitality; Hit Dice are equal to one half of the character's Vitality, rounded up.

Clarity
Clarity is a representation of a character's mental fortitude. It's also used both for the character's consciousness, and the clarity of their grasp on reality. Any character who takes nonlethal damage will receive damage to their Clarity, and mages who are attempting to use Magic must draw from their Clarity as a representation of a loss of focus on reality. A character who is reduced to 0 Clarity is unconscious.

Clarity is calculated by the character's Resilience; Clarity is equal to Resilience multiplied by 10.

Magic Resistance
Magic Resistance (MR) represents a character's resistance to the effects of magic. Note that this does not apply to magic that is considered mind-affecting, which is instead resisted with an opposed Will check.

Magic Resistance is a property of living beings that derives from their perceptions of reality, and as such, is equal to a character's Will + 1. When a character is affected by a spell, that spell's Potency is reduced by the affected character's Magic Resistance. This does not apply to spells cast by the character's allies, as it is generally assumed that the character has consented to these spells and is letting down their guard against them.