Inner fire

Levels of Inner Fire

a brilliant aura of pristine quality burning outward at twice your height
a brilliant aura of beautiful flames extending nearly twice your height above your body
a brilliant aura of beautiful flames extending a little more than one and half times your height above your body
a brilliant aura of flames that extends over your height again above you
a brilliant aura of flames that extends nearly your full height again above you
a brilliant aura of beautiful flames extending a little over half your height again above you
a brilliant aura of beautiful flames extending out around you about half again your height
a bright aura of beautiful flames extending out around you just beyond the reach of your arms
a bright aura of beautiful flames extending a quarter of your height above you
a bright aura of beautiful flames
a small aura of beautiful flames
a tiny aura of beautiful flames
a dim glow as if a flame lurked just out of sight

Inner Fire Pool

A Barbarian's IF pool never actually grows as the character grows. Instead, as you circle and grow stronger you learn to use your abilities more efficiently requiring less from the pool so to speak.

Regaining Inner Fire

You can regenerate IF actively as well as passively. To regenerate IF actively you need only land a killing blow against a creature using a weapon in which you can learn from them.