What damage does the Lucent Destroyer do? The description just states it's a musket with three barrels and it ignores the loading property. Since it ignores loading, having three barrels doesn't do anything unless you can fire 1, 2 or all 3 at a time (1d12, 2d12 or 3d12), but why would you ever not fire all three at once? "Oh I feel sorry for the little goblin so instead of splattering it across all of Faerûn, I'll just blast little holes in it till it stops screaming."
You cannot fire 3 barrels at a time. You fire once per attack, doing 1d12+1 radiant (for magic) each attack.
You can also cast Dancing Lights at will as an action.
You can also cast Sunbeam once a day as an action.
As these are casting, they require concentration.
The 3 barrel thing is effectively fluff text. Basically it is a requirement to have when you make this weapon, the extra barrels do not do anything after it has been enchanted, except look cool.
What damage does the Lucent Destroyer do? The description just states it's a musket with three barrels and it ignores the loading property. Since it ignores loading, having three barrels doesn't do anything unless you can fire 1, 2 or all 3 at a time (1d12, 2d12 or 3d12), but why would you ever not fire all three at once? "Oh I feel sorry for the little goblin so instead of splattering it across all of Faerûn, I'll just blast little holes in it till it stops screaming."
From Lucent Destroyer "... its damage is radiant instead of piercing ..." so it deals Radiant damage.
Except where explicitly contradicted a Lucent Destroyer behaves as a Musket as described in the DMG: https://www.dndbeyond.com/sources/dmg/dungeon-masters-workshop#FirearmsTable
You cannot fire 3 barrels at a time. You fire once per attack, doing 1d12+1 radiant (for magic) each attack.
You can also cast Dancing Lights at will as an action.
You can also cast Sunbeam once a day as an action.
As these are casting, they require concentration.
The 3 barrel thing is effectively fluff text. Basically it is a requirement to have when you make this weapon, the extra barrels do not do anything after it has been enchanted, except look cool.
Makes sense, thanks!