Aleister gritted his teeth, trying to hold his breath.
His powers seemed to be exploding. This has been happening to him for who knows how long.
Aleister felt it the day he overexerted himself in the library when Ruby fought with him. He has been feeling it since he was young.
Whenever he overused his powers, there was this feeling of being overwhelmed by his own powers. Like they would kill him at any moment.
And when he started looking into its mystery, it took him some time to discover that the golden magic that he possessed were divine powers that only existed in myths.
And for a human to possess that... the only fate was an untimely death.
This was the only reason that he held back... Held back on having Esme in every way he wanted. On getting married to her, on telling her what she meant to him, on...on having her body and when she confessed to him about his feelings, he held back on accepting her heart.