This item appears to be a longsword hilt made out of solacesteel inscribed with celestial symbols of the sun, fire, and goodness. It once belonged to a prophet of Raei known as the Soulfire Phoenix. While grasping the hilt, you can use a bonus action to cause a blade of pure flame to spring into existence, or make the blade disappear. While the blade exists, this magic longsword has the finesse property. If you are proficient with shortswords or longswords, you are proficient with the Soulfire's Sacrifice.

You gain a +2 bonus to attack and damage rolls made with this weapon, which deals fire damage instead of slashing damage. When you hit a target with it, that target takes an extra 1d8 radiant damage.

The sword's luminous blade emits bright light in a 15-foot radius and dim light for an additional 15 feet. The light is sunlight. While the blade persists, you can use an action to expand or reduce its radius of bright and dim light by 5 feet each, to a maximum of 30 feet each or a minimum of 10 feet each.

The Soulfire's Sacrifice has the following additional minor properties:

Harmonious. Attuning to this weapon only takes 1 minute.

Key. This weapon can replace the material component of the plane shift spell when the target destination is either the Blessed Fields of Elysium or the Island of Renewal, the divine realms of Pelor and Raei, respectively.

War Leader. You can use an action to cause your voice to carry clearly for up to 300 feet until the end of your next turn.

 

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Replace Damage Type: Fire, Damage: Radiant, Mourningsteel & Solacesteel In areas of intense bloodshed, mineral deposits can become suffused with the forlorn spirits of the creatures who were slain there. Such blood-soaked ore is called mourningsteel, and it’s through the same process that a soul can become a ghost that such a metal becomes available to the Ethereal Plane. While mourningsteel is a treasured material for enchantment on the Material Plane, it’s perhaps valued even more by those on the Ethereal, who use it for all manner of important, yet mundane purposes there. To that end, it’s not uncommon for ethereal opportunists to follow the paths of extraplanar wars in order to capitalize on their generation of potential mourningsteel. Mourningsteel can be found by anyone who happens across it on the Border Ethereal or Material Plane but it becomes isolated to only one plane immediately after it’s found and harvested. Solacesteel is the name for mourningsteel after it has become sanctified. The specific process by which this is achieved is largely unknown but is presumed to involve divine ceremonies, rituals, or other means, as solacesteel is only known to be wielded and used by legendary heroes, divine champions, or other great forces of good. As neither mourningsteel nor solacesteel are naturally occurring metals, finding either of them is exceptionally rare and can make quite the profitable business venture due to the minerals' scarcity and demand. Despite being derived from the same base, mourningsteel and solacesteel cannot substitute each other for use as components in enchantments or other magical purposes, requires attunement by a creature of non-evil alignment, Damage, Combat, Versatile, Sap