War Caster.  Zordono has advantage on Constitution saving throws that he makes to maintain your concentration on a spell when you take damage.

Zordono  can perform the somatic components of spells even when he has his pistol in his one hand.

When a hostile creature's movement provokes an opportunity attack from Zordono, he can use his reaction to cast a spell at the creature, rather than making an opportunity attack. The spell must have a casting time of 1 action and must target only that creature.

Gnome Cunning. Zordono has advantage on all Intelligence, Wisdom, and Charisma saving throws against magic.

Enhanced Defense. Zordono gains a +1 bonus to Armor Class while wearing his infused half plate.

Gunslinger. Being within 5 feet of a hostile creature or attacking at long range doesn’t impose disadvantage on the gnome's ranged attack rolls with a pistol. In addition, the drow ignores half cover and three-quarters cover when making ranged attacks with a pistol.

Spellcasting. The gnome's spellcasting ability is Intelligence(spell save DC 14). Zordono has the following artificer spells prepared:

Cantrip: message, mending

1st level(3 slots): absorb elements, faerie fire, cure wounds, heroism, shield 

Multiattack. The gnome makes two pistol attacks.

Infused Pistol. Ranged Weapon Attack: +7 to hit, range 30/90 ft., one target. Hit: 9 (1d10 + 5) piercing damage. This Pistol shoots magic bullets and does not require reloading by infusion from Zordono.