No Artificers are alike the Arcane Crafter due to its ability to maintain the weapons of them and creatures around them. 

Craft: Upgraded Weapon

You can use this feature a number of times equal to 2 + your Intelligence Modifier. Costing an Action, you can turn someone's weapon into a +1 version of itself, adding this bonus to its check roll as well as its damage roll. Using more charges on use, you can increase this bonus by +1. This effect lasts until the start of your next turn. 

Craft: Temporary Weapon

You use this feature when completing a Long Rest. You can craft a +3 simple melee weapon of your choosing and award it to a creature, including yourself. This weapon lasts until you perform another Long Rest if you craft another one. Creatures level 11 or lower wielding the weapon have a -2 penalty to their AC. 

Claw Trap

With a Bonus Action, you can throw a claw trap onto enemies, causing their weapon attacks to be made with Disadvantage. For the first of their turns they have the Claw Trap, if they choose to disarm it, they take 1d12 piercing damage but do so without any check needed. It costs an Action to remove the Claw Trap.

Enemies with the Claw Trap have a +2 to their AC but all non-magic melee attacks made against them are made with Advantage and deal a bonus 1d4 damage per attacking creature's level, starting at level 5 and higher. 

You can use this feature a number of times equal to 2 + your Intelligence Modifier. 

Craft: Shoulder-Mounted Ranged Weapon

Once per Long Rest, you can craft a small leather shoulder saddle and give it to a creature, including yourself. The selected creature can choose a single ranged weapon and place it onto the saddle. Once placed onto it, it can only be removed by destroying the shoulder saddle. Attacks with that weapon now cost a Bonus Action.