Nalindra

From Syra D&D Wiki

Nalindra is a minor deity of arcana and the sun. Long worshiped by only a scattered few, she rose to prominence as a fierce opponent of Nerull following Heironeous's death during the Deity War.

While most other sun deities espouse the warmth and life-giving nature of the sun, Nalindra instead focuses on its eternal heat and fury, urging her followers to unleash its might upon their foes. She advocates the relentless pursuit of one's foes, and teaches that mercy should never be offered if you would expect none from your enemy.