Battlesmith

Battle Ready. The battle smith's weapon attacks are magical, and it adds its Intelligence modifier to attack and damage rolls with them instead of Strength or Dexterity.

Infusions. The battle smith has three items infused with magical properties: its half plate which provides a +1 bonus to its armor class (included), its heavy crossbow which has a +1 bonus to its attack and damage rolls and lacks the loading property (included), and its greatsword which has a +1 bonus to attack and damage rolls and grants it the Radiant Flare reaction (included). If the battle smith dies, these magical properties end 4 days later.

Spellcasting. The battle smith is a 7th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 15, +7 to hit with spell attacks). The battle smith has the following artificer spells prepared:
Cantrips (at will): mending, light

1st Level (4 slots): cure wounds, faerie fire, false life, heroism, sanctuary, shield

2nd Level (3 slots): aid, blur, branding smite, heat metal, mirror image 

Multiattack. The battle smith makes two weapon attacks.

Greatsword. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Heavy Crossbow. Ranged Weapon Attack: +8 to hit, range 100/400 ft., one target. Hit: 10 (1d10 + 5) piercing damage.

Radiant Flare (2/Day). If the battle smith is wielding its greatsword, after being hit by an attack it can force the attacker to make a DC 15 Constitution saving throw. If it fails, the attacker is blinded until the end of the attacker's next turn.

Flash of Genius (4/Long Rest). When the Battle Smith or another creature it can see within 30 feet makes an ability check or a saving throw, it can add 4 to the roll.