Gnome Wizard Build Guide

Levels 1-4

Start with 15 Intelligence, 14 Constitution, and 13 Dexterity. Choose the School of Divination at level 2. Portent combined with Gnomish Cunning means you dictate the dice, not the DM. At level 4, take the Telekinetic feat, bumping your INT to 16. The invisible Mage Hand is great for a Gnome's utility, but the real prize is the bonus action shove. Use it to push enemies into your Web spell or pull allies out of melee, saving them from opportunity attacks.

Levels 5-10

Level 5 brings 3rd-level spells, the hallmark of the Wizard class. Hypnotic Pattern and Slow become your bread and butter. At level 6, Expert Divination refunds lower-level slots when you cast spells like Mind Spike, but keep your concentration focused on crowd control. At level 8, take the ASI to bump your Intelligence to 18, ensuring your spell save DC is mathematically sound. Your HP sits around 68 by level 10, so keep Shield and Absorb Elements prepared at all times to survive ambush attacks.

Levels 11-16

At level 12, max your Intelligence to 20. Your spell save DC is now terrifying. Level 13 unlocks 7th-level spells; Forcecage is the ultimate controller tool, trapping enemies with no saving throw. Level 14 brings Greater Portent, giving you three d20s to ruin the DM's day. At level 16, take the Alert feat. Going first means you drop a Wall of Force before the enemy can even move. Your Gnomish Cunning is working overtime in Tier 3, shrugging off high-CR monster spell-like abilities.

Levels 17-20

Level 17 grants 9th-level spells. Wish is mandatory. Use it to replicate Find Greater Steed or Simulacrum without material components. Your HP hits 104 at level 17, which is paper-thin against a dragon's breath weapon, making Absorb Elements vital since Gnomish Cunning doesn't protect against Dexterity saves. At level 19, grab Resilient (Constitution) to secure your concentration checks. Level 20's Signature Spells should be Shield and Misty Step—a Gnome Wizard's absolute best tools for surviving when the frontline collapses.

Cantrips

Take Mind Sliver. It targets Intelligence, reduces the target's next saving throw by 1d4, and perfectly sets up your devastating control spells. Ray of Frost provides an excellent 10-foot speed reduction to keep enemies away from your short 25-foot movement Gnome legs.

Level 1-2 Spells

Shield and Absorb Elements are non-negotiable for your survival. At 2nd level, Web is paramount. Cast it, then use your Telekinetic shove to push enemies back into the sticky strands if they manage to break free.

Level 3-5 Spells

Slow absolutely ruins multi-attacking monsters and doesn't friendly-fire your melee allies like Hypnotic Pattern does. At 4th level, Polymorph acts as both crowd control for enemies and an emergency 150-HP buffer (Giant Ape) for an ally. 5th level brings Wall of Force, the single best spell in the game for dividing a battlefield without offering a saving throw.

High-Level Spells

Mass Suggestion (6th) shuts down entire encounters without requiring concentration. Forcecage (7th) is Wall of Force's deadlier cousin. Finally, Wish (9th) gives you unparalleled versatility, letting you instantly replicate 8th-level or lower spells from any class list.

Telekinetic

Take this at level 4. It rounds out your odd 15 Intelligence to 16 and gives you a consistent bonus action. As a Wizard, your bonus action is usually empty. Shoving creatures 5 feet into your persistent AoE spells like Web or Evard's Black Tentacles dramatically increases your field control.

Alert

Going first is everything for a Controller Wizard. Dropping a Slow spell before the enemy melee fighters scatter prevents your party from getting swarmed. The immunity to being surprised also keeps your fragile d6 hit die safe from round-one assassinations.

Resilient (Constitution)

While Gnomish Cunning perfectly covers your mental saves against magic, you still need to maintain concentration when an arrow inevitably hits you. Gaining proficiency in Constitution saves guarantees your Wall of Force stays up when you take a stray hit.

Tier 1 (Levels 1-4)

Look for a Wand of Magic Missiles. It gives you guaranteed damage without burning your precious low-level spell slots. A Pearl of Power is also a godsend at this tier, recovering a 2nd-level slot for another cast of Web.

Tier 2 (Levels 5-10)

Acquire an Arcane Grimoire +1 to boost your spell save DC and attack rolls. A Cloak of Displacement is incredibly valuable here, imposing disadvantage on attack rolls against your miserable unarmored Wizard AC.

Tier 3 (Levels 11-16)

Upgrade to an Arcane Grimoire +2 or +3. Seek out a Staff of Power. It grants a +2 bonus to AC, saving throws, and spell attacks. Combined with Gnomish Cunning, your mental saving throws become mathematically unbeatable for most enemies.

Tier 4 (Levels 17-20)

The Robe of the Archmagi is your ultimate defensive item, setting your base AC to 15 + DEX and further boosting your spell save DC. If you can secure a Staff of the Magi to absorb enemy spells, you achieve demigod status.

As a Controller, your job is not to deal damage, but to multiply the effectiveness of your party. You isolate threats, strip away enemy actions, and create advantageous terrain. Your low DPR (peaking at 13.2 with cantrips at level 17) means you rely entirely on your team to mop up the enemies you incapacitate.

You pair perfectly with an Oath of the Ancients Paladin. Their Aura of Warding halves spell damage, which stacks beautifully with your Gnomish Cunning advantage on magical mental saves. A Gloom Stalker Ranger or Assassin Rogue also synergizes brilliantly; they thrive on the advantage you provide via spells like Hold Person or Greater Invisibility.

Artificer 1 dip

Starting as an Artificer at level 1 gives you medium armor, shields, and Constitution saving throw proficiency without delaying your spell slot progression. Your Gnome Tinker flavor aligns perfectly, and an AC of 19 (Half Plate + Shield) makes you infinitely harder to kill than a pure Wizard.

Fighter 2 dip

Action Surge on a Wizard is game-breaking. Casting two leveled spells in a single turn—like Mind Sliver into Feeblemind, or dropping a Sickening Radiance and immediately trapping the boss in a Forcecage—ends encounters instantly. You also gain armor proficiency, though your 8 Strength means heavy armor will drop your 25-foot Gnome speed to 15 feet. Stick to medium armor.

• Ignoring your physical saves: Gnomish Cunning only applies to Intelligence, Wisdom, and Charisma saves against magic. You are still completely vulnerable to poison (CON) and dragon breath weapons (DEX). Keep Absorb Elements prepared.
• Over-preparing blast spells: You are a Controller, not an Evoker. Wasting slots on Fireball instead of Slow or Hypnotic Pattern dramatically reduces your party's survivability.
• Forgetting Mage Armor: With your d6 hit die and likely 13 Dexterity, your AC is a pathetic 11 unarmored. If you don't multiclass for armor, casting Mage Armor is a daily tax you cannot avoid.
• Poor positioning: Gnomes only have a 25-foot walking speed. If a melee brute gets close, you can't easily outrun them without burning a 2nd-level slot on Misty Step. Use Ray of Frost to slow pursuers.