A master channeller knows the rules about energy redirection and storage like
no other. They can focus this ability into the absorption aura. Not only will
this anti-energy field siphon away some of the mana, fire, and lightning
damage coming at the caster, but it will store it for later use. Any damage
prevented by this aura can be added to spells of the same type the caster uses
while the aura remains intact.
The aura can only store a fixed amount, dictated by the caster's mastery of
channelling. Any energy over that is released back into the environment, in a
safer, even beneficial, form.