In Dungeons and Dragons, 5e Radian damage is one of the 13 damage types and it is the best creature that resists and has the immunity but the player character will have a wide variety of spells that are available to cause it.
Radiant Damage 5e
This creature serves as the sort of antithesis to the necrotic damage and this often stands in the opposition to the negatively aligned creature which is completely undead and fiends. Radiant damage 5e is a magically aligned type and it is a more natural type like lightning damage which describes becoming a bit tricky.
Overview
You can easily describe Radiant damage in 5e through the searing pain that it causes and this wouldn’t result in some of the physical burns which result from something like fire damage. Suppose if anything happens as physical indicators of Radiant damage the radiation burns or it is distributor like the physical attributes of a creature that is burnt away due to existential harm of this type of damage.
Description
Even if there are certainly different flavors of Radiant damage 5e a druids moonbeam that looks like a shaft of silvery moonlight by rest the clerics scared flame will resemble as a blast of Golden fire this type of damage is pretty much always and it is expressed as bright light. The exact appearance and the color of Radiant damage could completely depend on the character which inflicts to mention the effects upon the other 4 senses.
Spells in 5e
Naturally, there are few spells that deal with Radiant damage in 5e, and these spells are available only for two clerics and paladins. There are also a few available to other classes and some actually exclude cleric and paladin so here you will be having some options for the playing character to access with these spells. The downside with some higher levels will not be able to utilize until the later one receives here you have multiple options for every level and you can choose your best as per your willingness.
Monster interactions
Radiant damage 5e is the one to force the damage in terms of immunities and resistance when it comes to the non-mundane types. Few of the Monsters have the vulnerability to the radiant damage while few creatures mitigate all these types of damage and they will likely deal with extra damage which is taken by the same token. There are many weapons that are scattered through D&D and these have been touched by the universe to serve them.
Immunity against Radiant damage
Even few of the creatures that have immunity against radiant damage resist it, and the number of creatures with strong immunity will force to damage the good creatures and it is one of the challenging processes. The downside to the rarity of Radiant damage is a few creatures that take extra damage to form it. Radiant damage is one of the most damage types equating to divine or holy damage there are multiple good numbers of spells and it covers the entire range levels.