A character's Tenacity is a measure of how many magical effects he can hold onto at any given time.  

A character's Tenacity is a measure of how many magical effects he can hold onto at any given time.  

It is equal to 1/2 Willpower * 1/2 [[Capacity]].

It is equal to Willpower + 1/2 [[Capacity]].

Most spells change something about the world once and then are done. Some of these effects are instant (lighting a fire); some of them change something and then the effects linger, eventually wearing away (toughening armor). Occasionally a spell requires the caster to be constantly attending to it. These spells require Tenacity.

Most spells change something about the world once and then are done. Some of these effects are instant (lighting a fire); some of them change something and then the effects linger, eventually wearing away (toughening armor). Occasionally a spell requires the caster to be constantly attending to it. These spells require Tenacity.