You are a god, an immortal entity of nigh-incomprehensible power. Reality is comprised of nigh-infinite planes of every type imaginable, each with their own races, pantheons, and laws of magic. Deities are able to travel between planes at will, and sufficiently advanced magic allows mortals to travel between planes. As a deity, your vast strength grows from the worship of mortals, the sacrifice of their valuables, the consumption of their souls, and the spread of your Mantle's influence.
No deity is truly omnipotent, and only a few come close, however vast their power is, it is finite and should it run thin, they'll suffer and eventually starve. Divine Intervention of any sort, be it blessings, miracles, or manifesting a direct avatar, costs an amount of power equivalent to the strength of the Divine Intervention. There are only a handful of ways to reduce the power lost in divine intervention, and chief among them are Mantles. A Mantle is an aspect of reality over which a deity reigns, and so long as they act within the Mantle, the cost of divine intervention is halved. They range from incredibly specific to immensely broad, and the more specific a Mantle is, the more effective divine intervention is within its constraints.
As an example, a Mantle giving power over Fire could be anything from 'Sparks' to 'Burning' to 'Heat.' The only ways to gain a Mantle are through being worshiped as a god of the Mantle, trading with other deities, and consuming the essence of a slain deity. Mantles are not exclusive, many gods reign over the same, and some aspire to be the only god of a Mantle. Each deity possesses at least one Mantle, and while there is no upper limit to the amount of Mantles, most elder gods begin to consolidate their power somewhere around thirty.
Being a deity, you have a personal plane of reality where your worshipper's souls go when they die. There, your power is enhanced threefold, and you are able to freely manifest. Your godly realm's appearance is subject to your desires, and if you have no preference, it will design itself in accordance to your personality, your worshipper's beliefs, and of course, your Mantles.
Every deity, no matter how weak or mighty, young or ancient, possesses a self-assigned goal which they pursue with single-minded devotion, and you are no different. Whether your aspirations are lofty, humble, or utterly banal is your choice, and a god can change their goal at any moment, but each deity must have something to strive for.
You are a young god, born a mere handful of centuries ago, and only possess a single Mantle, which has had a tremendous impact on who you are as a deity.
What is your godly name?
How does your true form manifest?
Which Mantle do you claim?
What is your current goal?