Diablo 4 Season 15 Leveling Guide: Fastest Way to Reach Level 70 with Hellworms, Under City & War Plans

Summary

Season 15 of Diablo 4 is here, and leveling from 1 to 70 has never been faster — if you know the right strategies. In past seasons, experienced players have completed the 1-70 run in as little as 90 minutes, and these same methods extend into Paragon grinding later on. In Season 14, one player reached Paragon 300 on Hardcore Solo Self-Found just days into the season using these exact strategies.

This guide covers the three primary leveling methods for Season 15: Hellworms, Under City, and War Plans. Each has its own strengths, difficulty level, and time investment. Whether you want to speedrun or take a chill approach, there's a strategy for you. If you'd rather skip the early grind, MMOEXP is a trusted marketplace where you can safely buy D4 Gold to fund vendor gear and upgrades.

Important note: There's suspicion that Hellworms and XP globes may receive nerfs in the final patch notes. Keep this in mind, though the overall ranking between strategies should remain the same.

Strategy 1: Hellworms (Fastest, Hardest)

Hellworms are the best leveling strategy in Season 15 — but also the most demanding. If executed well, you can reach level 70 from any point in as little as 30 minutes. Most of your time will be spent trying to spawn the Rift and Rot Hellworm.

Step-by-Step Process

Phase 1: Levels 1-24 — Helltide Only War Plans

Set your War Plan objective to Helltide only

At levels 1-24, your only War Plan options are Nightmare Dungeons and Helltide

Do as many Helltide objectives as possible without leveling too much

Why: At level 25, you unlock additional War Plan objectives (Under City, Hordes), which dilutes the pool. You want to rush to the second point on your War Plan tree before that happens

Phase 2: Farming XP Globes

The key XP globes come from Helltide maggots:

Hellmouth globe

Rift and Rot globe

Once you have Rift and Rot, you can giga-farm experience. Every Hellworm can give multiple level-ups, and you can spawn multiple worms in a minute. Some players report gaining 10 levels in a single minute once the setup is complete.

Phase 3: Hellworm Spawning Route

Use a Hellworm tracker to see active Helltides and filter for worms

Get to 50%+ threat in a Helltide zone

Run a path from spawn to spawn, hoping for Hellworms to appear

The more threat you have, the more likely worms spawn

Avoid killing anything else once you're close to spawning the worm — you don't want to overshoot your threat

When the Hellworm appears, ignore it — don't kill it

Go back, rebuild threat to 50%+, and repeat

Do this several times to stack XP globes

Phase 4: Difficulty Management

Don't push too high a difficulty — you'll be weak because monsters level up faster than you

You may not even spend skill points because everything happens so fast

Remedy: Go back to town every few level-ups, buy new gear from vendors (weapon, armor), and use those power bursts as long as possible

Repeat the buy-and-burst cycle

Strategy 2: Under City (Simpler, Consistent)

Under City is much simpler than Hellworms and offers consistent XP globes through attunement levels.

Step-by-Step Process

Phase 1: Rush to Level 25

Level as fast as possible to 25 — if you're strong enough, use Hard difficulty instead of Normal

Once you hit 25, Under City unlocks

Phase 2: Unlock Jade Epiphany

In Under City, your first War Plan node is Jade Epiphany

It takes three War Plan completions on Expert or higher difficulty to unlock it

Speedrun method: Open Under City, walk to the end, kill only the boss, ignore everything else

If you feel too weak, do four runs on Normal or Hard instead — it's a min-max choice

Phase 3: Farm Under City to Attunement 4

Once you have Jade Epiphany, farm Under City exclusively

Every new attunement level gives you globes:

Attunement 1: 1 globe

Attunement 2: 2 globes

Attunement 3: 3 globes

Attunement 4: 4 globes

You don't need to do any other War Plan rewards — just farm Under City to max attunement

Strategy 3: War Plans (Chill, Varied)

If you want a relaxed session without repeating the same activity for hours, War Plans are your best option.

How It Works

War Plans are relatively rewarding early on, especially for XP. Instead of farming XP globes from Hellworms or Under City, you can earn them from War Plan rewards across any activity.

Activity Rankings

Recommendation: Stick to Helltide, Pit, and Under City for the best results. Avoid Hordes entirely.

General Tips for All Strategies

Don't over-invest in gear early — You'll outlevel it too fast. Buy vendor gear every few levels instead

Spend skill points efficiently — Even if leveling is fast, having a functional build matters

Use difficulty wisely — Higher difficulty means more XP, but only if you can handle it

Track your Helltides — Use external tools to find active Helltides and filter for Hellworms

Stack XP globes — They're the core of fast leveling in Season 15

Consider nerfs — If Hellworms or XP globes get nerfed, Under City and War Plans become more important

Quick Reference

Conclusion

Season 15 offers multiple viable paths to level 70, each with its own trade-offs. Hellworms are the fastest but require precise execution and threat management. Under City is simpler and more consistent, ideal for players who want a straightforward grind. War Plans offer variety and a chill experience for those who don't want to repeat the same activity for hours.

Whichever strategy you choose, the key is to stack XP globes, manage your difficulty, and upgrade gear at the right moments. If you're short on gold for vendor upgrades, MMOEXP is a trusted marketplace offering safe and reliable D4 Gold for sale. Good luck in Season 15 — and may your Hellworms spawn often.