While setting the search filters for Damage and Force in "Magic Items", this item does not appear. Just wanted to point that out.

Does using a wand use up a spell slot?

Nope, the item has its own charges that it uses.

Quote from theboot8 >>

From DMG p135:

Uncommon Magical Items are valued between 101-500gp

also:

"unless you decide your campaign works otherwise, most magic items are so rare that they aren't available for purchase... ...In a large city with an academy of magic or a major temple, buying and selling magic items might be possible , at your discretion..."

 Magic item costs in the DMG are completely off, the wand of power in my campaign is worth about 5-6000 gold, 

Quote from Zwordsman >>

I believe  that the artilirist specifies ' roll a d8. you gain a bonus to one of the spell's damage rolls equal to.."  so I think that they're all individual rolls so only one extra d8. same for scorching ray.

 

I find myself wondering, if there is any way to make a magic missle wand as an infusion for the Artificer? That would be a solid choic

 RAW, because the darts hit simultaneously, you roll once and apply it to each dart. So it's (1d4+1)x3 rather than 3d4+3 when casting it at 1st level, for example. So, the 1d8 from arcane firearm would work fantastically with this, because it would become (1d4+1d8+1)x3 and not 3d4+1d8+3. Unfortunately this isn't on the list of eligible items to be replicated with infusions, but if you come across one in your campaign it's a solid choice.

Quote from temery2383 >>

 

 

 

Beyond 20

 

 

 

 

 

Quote from Zwordsman >>

I believe  that the artilirist specifies ' roll a d8. you gain a bonus to one of the spell's damage rolls equal to.."  so I think that they're all individual rolls so only one extra d8. same for scorching ray.

 

I find myself wondering, if there is any way to make a magic missle wand as an infusion for the Artificer? That would be a solid choic

 RAW, because the darts hit simultaneously, you roll once and apply it to each dart. So it's (1d4+1)x3 rather than 3d4+3 when casting it at 1st level, for example. So, the 1d8 from arcane firearm would work fantastically with this, because it would become (1d4+1d8+1)x3 and not 3d4+1d8+3. Unfortunately this isn't on the list of eligible items to be replicated with infusions, but if you come across one in your campaign it's a solid choice.

 When you roll damage for a fireball, do you just roll 1d6 and multiply it by 8?

Quote from chrusa2 >>

Quote from temery2383 >>

 

 

 

Beyond 20

 

 

 

 

 

Quote from Zwordsman >>

I believe  that the artilirist specifies ' roll a d8. you gain a bonus to one of the spell's damage rolls equal to.."  so I think that they're all individual rolls so only one extra d8. same for scorching ray.

 

I find myself wondering, if there is any way to make a magic missle wand as an infusion for the Artificer? That would be a solid choic

 RAW, because the darts hit simultaneously, you roll once and apply it to each dart. So it's (1d4+1)x3 rather than 3d4+3 when casting it at 1st level, for example. So, the 1d8 from arcane firearm would work fantastically with this, because it would become (1d4+1d8+1)x3 and not 3d4+1d8+3. Unfortunately this isn't on the list of eligible items to be replicated with infusions, but if you come across one in your campaign it's a solid choice.

 When you roll damage for a fireball, do you just roll 1d6 and multiply it by 8?

 Fireball doesn't have multiple "glowing darts" that strike simultaneously. Magic Missile is a really unique spell in the way its damage rolls are supposed to be handled, and this has been confirmed by WotC. There is only one damage roll when you cast the spell, and that result is applied to each dart. So Magic Missile scales really well with damage bonuses.

if its a wand can it be used as a spellcasting focus?

Quote from Chaosrex >>

If you turn this into an Arcane firearm using the Artillerist feature.

Would that add 1D8 per dart? Or only on the total of dmgs dealt?

 RAW magic missile is one roll, so it would apply to all darts.

Ignoring the fact Arcane Firearm only applies to Artificer spells...

You roll once and each dart does the same damage... but each dart is a seperate source of damage. So if you roll a 3... they're all the same, so that's three seperate rolls of 3+1... but only one of those darts gets the d8 attached. 

This is why magic missile is great at attempting to break concentration. Each dart is its own instance of damage.

could you re-flavor this to be a bow and give it to a ranger or rogue without it technically being homebrew?

Can someone wearing armour they are not proficient in use a wand of magic missiles?

Would Wand of Magic Missiles work with Empowered Evocation?

Yes. You still cast the spell unless the verbiage explicitly states otherwise. In this case, "For 1 charge, you cast the 1st-level version of the spell." All features that apply to spells you cast would affect the effect of this wand.

Is it made of wood or metal? Just in case I need to break it to save people.

Reflavoring is homebrew, but why exactly are you avoiding "technically" homebrew? You can just ask your DM if it isn't too OP.

It's hard to overstate how powerful of a magic item this is at lower levels. Giving this to a level 2 player will allow them to start punching significantly above their weight class. Even if they're careful to never let it run out of slots, being able to nail an enemy for 8d4+8 without an attack roll or saving throw every few days is super impactful.

My only concern with giving this to a rogue and telling them it's a bow would be the potential for disappointment when it doesn't allow them to get sneak attacks

Quote from SaintSquid >>

It's hard to overstate how powerful of a magic item this is at lower levels. Giving this to a level 2 player will allow them to start punching significantly above their weight class. Even if they're careful to never let it run out of slots, being able to nail an enemy for 8d4+8 without an attack roll or saving throw every few days is super impactful.

 Wouldn't it be 9d4+9 max damage?  

Level 1 = three darts of 1d4+1 = total of 3d4+3.  Use all remaining 6 charges at once at 1d4+1 per charge = 6d4+6

3d4+3+6d4+6= 9d4+9