Given the Country's involvement with magic, it should come as no surprise that religion and a sense of higher powers have embedded itself in the population. There are numerous entities of great and terrible power: Whether they are Gods, Great Old Ones, Spirits, or other creatures.
Technically there are nine divine beings in the realm of Halruaal, though the Church of the Seven only recognizes Seven gods and goddesses in Halruaalan society. Each of them were once a spellcasters at the peak of their arcane study. After the events of the Spellplague, they surpassed their mortal coil and achieved divinity. In addition to the Seven, there is Andrusil: the god worshipped by the elves, and the Wanderer: The god of outcasts, trickery, and the occult.
The Great Old Ones are beings that are older than the Gods of Halruaal, but of "lesser" power. Their presence is shrouded in mystery, and even the most eccentric of scholars have only identified four. These are The Ones Below. Entities of primal elements, simplified and categorized for the ease of their adherents - but even this is not wholly complete
As for spirits and powers of nature, they are akin to the Fae: beings of great natural and spiritual power, but not necessarily divine. These beings are all throughout the country, but they hold a special symbolic connection in the Ashlands and in the North. There they are widely worshipped by natives to Halruaal. While not technically as powerful as the Gods, or even The Ones Below, they are extremely active in every day life, to the point where those that travel in the North have at least encountered them once. These spirits are of a magical and supernatural level greater than the magical beast that roam the countryside, and have power of their own - much to the point of causing trouble every now and then to the Magisterium.