Interested in Yvithia's work on the budding city of Viden, Aelig spent arcs disguised as different residents, watching its walls built brick by brick and observing as its human population continued to grow. It was during this time he noticed the promise of Ramora's skill, a young woman used to neglect and starved for affection. With a dwindling fortune and a pathetic dowry all but pawned for her craft, it was only a matter of time before she would have to give up the practice, unable to afford it at all. Disguising himself as an investor and then an instructor, he offered to guide her study of Alchemy, wondering how obedient she could be and how quickly she learned. She exceeding his expectations and under his guiding hand, they built many wondrous and wicked things, "all for science", or so he would lie. These items became some of the most unpredictable and violent weapons to grace Idalos at the time. Finally, he had found a his playmate in chaos.

It was almost too easy to suggest and initiate her into dark magics, starting first with mirage and then aberration. Within a few arcs, he had her under his finger completely and exploited her insecurities. Knowing she was afraid of aging, he requested she make him something new, and in return, he would grant her eternal life. Accepting this offer, truly believing the Immortal loved her and they would be side by side forever, she gave birth to Mastemyr, the Immortal of Cats, Crisis, and Delirium.

Catatonia Ability

While certain physical traits of Mastemyr are permanent this mortal born can knowingly enhance his body to that of his feline counterparts and eventually become one. These changes could appear subtly, changing his eyes to cat-like slits for enhanced night vision or sharp claws while rough pads harden his palms for added silence and traction. Mastemyr can push these boundaries, fully utilizing this ability to transform his body into a feline of his choice at the risk of losing himself mentally. Mastemyr cannot push past the limitations of his new body and transforming is exceptionally painful, favoring a simple house cat for its simplicity and familiarity. He may pick only three feline forms a season. Disease, fatigue and injury also transfer with him.

The longer he mimics a feline, the more instinctual his mind becomes, with the possibility of leaving him feral when he returns to humanity. If more than a few trials of time have passed as a cat, Mastemyr begins to lose memory of his former self and risk becoming stuck until triggered through physical or emotional shock. Afterward he is not only feral, but teetering on the brink of madness, taking anywhere from breaks to entire seasons to recover. In some cases, he may never return to who he once was losing himself to the imitation.

Crisis Cycle Ability

Drawn to areas where crises happen often, Mastemyr is capable of feeding off the sensation of crisis in others, giving himself boosts to the event at hand. A collapsing bridge might give him better capability in swimming, or a burning building could create a resistance to smoke inhalation or a tolerance to high temperatures. He may only keep these boosts for a single trial before chaotic poisoning sets in. When this happens, he struggles to maintain and control a form, with situations around him altering in strange and unpredictable ways. Physically, he risks exhaustion from overuse, which could result in loss of consciousness or death. To get rid of these boosts before the negative side effects can kick in, Mastemyr must find someone to pass the crisis too, often tormenting them in the process, as they become fully convinced they are about to experience the originating trauma. Those with higher discipline may resist this ability, although they might have a creeping sensation that something bad is about to happen, if nothing else.

Touch of Delirium Ability

Mastemyr lives in a state of a sort permanent sleepwalking, where reality and fantasy mix together in the waking word for the eyes of the MB only. Through touch, the MB can steal bits and pieces of the victim's personal domain in Emea and replace them with its own. The stolen pieces manifest in the waking world for him, allowing the MB to explore the unconscious mind of the victim. The MB will be able to comprehend the extremely vivid fantasy like no other can, allowing the gathering of information and deeper understanding of the victim’s psyche. At will, the MB can draw his victim into the waking delusion, choosing to grant understanding or not. Stolen pieces from Emean personal domains last only 15 trials, and the MB must wait a cycle before stealing from the same victim again. Overuse of this ability manifests by a growing difficult to decipher the real from the fantastical - a dangerous consequence depending on who or what he steals from.