Garlean Physiology

[MrThinker]

I think his short story in the Chronicles book sheds light on how he managed it - in his youth, he managed to do so by embedding a crystal into his flesh (specifically his palm), and doing so let him channel the necessary aether to produce a technique he should not have been able to do. I wouldn't not put it past him to continue this trend as needed into adulthood.

I was under the impression that he gave up that 'method' and began pursuing other forms of enhancement specifically because the method was unwieldy and not to his tastes... but I realise the only part that was actually stated was 'persuing other forms of enhancement' and it doesn't specifically say he gave up the crystal embedding.