My Runaway Train: How I Built the Eldritch Blast Cannon

Let me just say it straight: my last run in Baldur’s Gate 3 was a disaster. I was trying to be clever, juggling five different spell schools, running a half-baked Monk-Rogue combination, and honestly, I was missing three quarters of my attacks. It was driving me nuts. I spent more time checking logs to see why my precious Sneak Attack didn’t proc than actually playing the game. I was done messing around with complicated setups that ask you to click ten things before you hit one guy. I needed something simple, something that just worked, every single time.

That’s why I decided to pivot. I tossed that complex junk in the trash and went back to basics. I needed a build that was a one-button solution but still hit like a truck. And you know what that means in this game? Warlock. Specifically, the Eldritch Blast (EB) focus. This isn’t groundbreaking stuff, anyone can tell you Warlocks are good for this, but I wanted to document the exact moment it clicked for me, and the cheap tricks I used to make it completely broken.

The Starting Line: Character Creation and That First Level Kick

I rolled up a Githyanki Warlock. Why Githyanki? Because I like the armor choices and having Jump, honestly. Race barely matters here, just pick what looks cool.

The core stat: Charisma (CHA). I pumped that up to 17 right out of the gate, dumped everything else into Constitution (CON) for some health, and just let Dexterity (DEX) hover around 10 or 12. Warlocks are a one-stat class, which is what makes them so relaxing.

For the subclass, I went straight for The Fiend. Listen, the temporary hit points (temp HP) you get from killing something early on is a lifesaver, especially when you are low level and still figuring things out. I knew I was going to be blasting people constantly, so that consistent trickle of temp HP meant I could take a hit or two without crying to the nearest cleric.

The cantrip I picked? Duh. Eldritch Blast. That was it. I grabbed another cantrip, like Minor Illusion, but honestly, I never used it. I was laser-focused.

The Moment It Became an Autocannon: Level Two Invocations

This is the single most important step in the whole process. If you miss this, your Warlock is just straight up trash. You hit Level 2, and you get two Eldritch Invocations. I picked these two, and if you pick anything else, you’re playing it wrong:

• Agonizing Blast: This is the whole reason the build exists. It adds your CHA modifier to the damage of Eldritch Blast. What does that mean? It means your EB is no longer just a cantrip; it’s a main attack that scales up with your primary stat. It’s free damage, and a lot of it.
• Repelling Blast: This one is the sneaky MVP. It pushes the target back 4.5 meters (15 feet). This is where the control comes from. Shove an enemy off a cliff, into a fire, or away from your squishy wizard friend. My goodness, this changed the game for me. It turns the battlefield into a giant pinball machine, and I’m the flipper.

Once I got these two, everything changed. I suddenly wasn’t thinking about positioning or saving spells. I just pointed and blasted. My action economy was perfect: one action, massive damage, huge control. Done.

The Gear Hunt: Finding the Right Threads

I spent a good chunk of Act 1 just wearing whatever. But when I got into Act 2, I started hunting specific items. You absolutely need to get these two pieces, they are the backbone of the “broken” part of the build:

• Potent Robe: This is a massive find. It adds your CHA modifier to the damage of your cantrips again, and gives you temp HP. Notice a pattern? It stacks with Agonizing Blast. So now, my EB hits like a goddamn truck. I was hitting for crazy damage and feeling pretty tanky while doing it.
• Hat of Fire Acuity (or similar items): Look, any item that boosts your Spell Save DC or gives you more chance to hit is gold. I found the Hat of Fire Acuity which helps build up Arcane Acuity, which makes your subsequent spells stick better. Sure, EB isn’t a save-spell, but it helps set up my other spells or my teammates’ spells.

It wasn’t easy to get these things, let me tell you. I had to bribe a few people, steal a few things, and reload a few saves, but once the gear was on, my Warlock went from being a good choice to an S-tier monster.

Feats and Final Thoughts: The One-Trick Pony That Slaps

As I leveled up, my Feats were incredibly simple. Nothing fancy. I didn’t mess with multiclassing at all; I just focused on one thing: more CHA.

• Level 4: Took the Ability Improvement Feat and boosted CHA from 17 to 19.
• Level 8: Took the Ability Improvement Feat and maxed out CHA at 20.
• Level 12: At this point, I could have taken Spell Sniper for the extra crit chance, but honestly, I just took Resilient (CON) to help maintain concentration on my few actual spells, like Haste or Hex. Stability is key.

The final verdict? This build is utterly reliable. It’s not the most interesting or complex thing you can do, and my friends complained that all I ever did was shout “PEW PEW PEW” and push people off ledges, but I was the one consistently clearing the battlefield every single turn. This Eldritch Blast Warlock build is the definition of efficiency. If you’re a beginner, or like me, you are tired of missing easy shots, build this thing. It’s a runaway train, and it will carry your whole team. Go get ’em.