Sun Blade
Rare weapon from the D&D 5e SRD.
Sun Blade at a glance
Description (SRD)
Weapon (longsword), rare (requires attunement) This item appears to be a longsword hilt. While grasping the hilt, you can use a bonus action to cause a blade of pure radiance 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 sun blade.
Game facts from the System Reference Document 5.1 by Wizards of the Coast LLC, licensed under CC-BY-4.0.