Diablo 4 Season 15: Fast Paragon XP Farming in the Kurast Undercity

Season 15 reshuffled where the best experience comes from. The old Helltide worm loop was cut down, and the fastest path to Paragon 300 now runs through the Kurast Undercity, high-tier Infernal Hordes, and a stack of experience buffs that multiply everything you kill. Set up correctly, a single run can move you well over a full Paragon level.

Quick answer: Run Kurast Undercity with the Jade Epiphany node and a Rank 4 Splinter of Destruction for bulk XP orbs, then push Infernal Hordes on Torment XI–XII to close out Paragon 300.

Levels 1–25: Questline, Helltides, and cache transfers

The early climb is short. Finish the seasonal questline first, since it rewards the Splinter of Destruction tied to Baal, which powers up the Undercity later. If you are still under level 25 afterward, farm Helltides on Normal, then switch to Penitent difficulty when you turn in and open chests. That scales the reward without forcing you into dangerous fights while undergeared.

For alternate characters, farm Whispers of the Dead and the limited-time Gift of the Tree caches on your main, then move them through the shared stash. Opening those caches on an alt hands it free experience immediately, skipping most of the manual grind.

Helltide worm farming was reduced in Season 15. Plague Maggot Young now have a lower orb drop chance, and Portent of Pain and Plague Devourers drop 1–2 experience orbs instead of a guaranteed 2, which is why the Undercity is now the stronger default.

Patch Notes: Helltides Nerfed — A Helltides patch notes screen lists reduced Plague Maggot Young orb chances and 1–2 orb drops from Portent of Pain and Plague Devourers. Shown at 00:48 in Osterberg501’s video. Image: Blizzard Entertainment

Kurast Undercity with Jade Epiphany: levels 25 to early Paragon

Once the Undercity unlocks at level 25, it becomes the core experience loop. The whole method rests on one War Plan node called Jade Epiphany. Every time you gain an Attunement level inside a run, it spawns a cluster of experience orbs around you, and it also raises Monster Power for everything in the dungeon.

Allocate points to the Undercity’s War Plan nodes until you reach Rank 1, then activate Jade Epiphany. No other unlock is more important for this route.

Stage 2 (Level 25 to 60+ / Early Paragon) — The Undercity activity tree with Jade Epiphany selected as the first key node. Shown at 02:27 in RageGamingVideos’s video. Image: Blizzard Entertainment

Read the node tooltip and confirm the effect. At Rank 4 with the Splinter of Destruction equipped, Jade Epiphany grants 50% more experience orbs per Attunement level and adds +1 more Monster Power on top of its base bonus.

Skill Tree: Jade Epiphany — The Jade Epiphany node tooltip explaining the experience orb and Monster Power bonuses. Shown at 03:04 in Osterberg501’s video. Image: Blizzard Entertainment

Enter the Undercity without spending a Tribute. Keys are not required for pure experience farming, so you can jump straight into free, repeatable runs.

Activate beacons and clear enemies to raise your Attunement rank. Each rank you gain triggers a fresh burst of experience orbs. Pick them up yourself rather than relying on a pet.

Double Orb Value Explained — A spirit beacon detonating amid stacked experience popups after an Attunement rank gain. Shown at 03:42 in Osterberg501’s video. Image: Blizzard Entertainment

Difficulty scales the orb value sharply. Orbs are worth far more at higher Torment, and at Torment XII each orb can grant over 1.7 million experience, so push the highest tier you can clear comfortably.

Two additional nodes make the loop faster. Once you cap Attunement, Pathfinder opens a portal to the final boss room, bypassing the third floor. Siege Engine Prime Evil can provide extra Attunement, so using both lets you reach the cap by floor 2 and warp straight to the boss. In just a handful of runs, this dependable route takes a character from level 25 to 60 and keeps granting over half a Paragon level per run up to about Paragon 230.

Infernal Hordes: pushing Paragon 230 to 300

Undercity gains slow down near Paragon 230. From there, high-tier Infernal Hordes on Torment XI or XII takes over, but it needs a real endgame build to survive the scaling. The engine here is two socketed splinters working together.

Splinter	Effect
Greater Splinter of Damnation	+1 Monster Power and +25% experience per elite pack killed for 20 seconds, stacking to 200%
Splinter of Lies	+25% bonus experience, +85% gold, +16% movement speed, but you stay Weakened and Vulnerable

Equip the Greater Splinter of Damnation. Every elite pack you kill raises Monster Power by 1 and adds 25% bonus experience, and those stacks build up to a 200% cap. The higher Monster Power climbs, the more each kill is worth.

Splinter of Damnation Mechanics — The Greater Splinter of Damnation item card describes gaining Monster Power and 25% experience from elite kills. Shown at 04:22 in RageGamingVideos’s video. Image: Blizzard Entertainment

Put the Splinter of Damnation in Leoric’s Crown. Your buff will last 33 seconds instead of 20, making it much easier to keep your stacks up between elite kills rather than letting them expire.

Leoric's Crown Buff Extension — The extended buff duration of 33 seconds after socketing the splinter into Leoric's Crown. Shown at 05:27 in RageGamingVideos’s video. Image: Blizzard Entertainment

Add the Splinter of Lies for a flat +25% experience. The permanent Weakened and Vulnerable debuffs are the trade-off, so only run it when your build can absorb them.

During offering selection, prioritize Hellborne boons, especially the ones that spawn extra Hellbornes. Each Hellborne counts as its own elite pack kill, so they rapidly generate 10 to 25 or more Damnation stacks and drive Monster Power up like Pit tiers.

At maximum stacks, a successful run can award over two complete Paragon levels, even beyond Paragon 239. That rate can carry you into the 300 range.

The 15% Experience Well buff to layer on top

One more multiplier applies across everything above. A Nightmare Dungeon Sigil carrying the Forgotten Wisdom affix lets elite monsters drop wisdom, and it unlocks an Experience Well inside the dungeon.

Find or craft a Nightmare Dungeon Sigil bearing the Forgotten Wisdom affix. Lost Archives is one sigil that can roll it.

Once inside the dungeon, use its interactive Experience Well. It gives you a 15% increased experience buff for a full hour, which stacks with your other bonuses. Use the active timer to run your Undercity or Infernal Hordes loop.

Open-world Helltide variant for Mythics and cinders

If you want experience alongside loot, there is a Helltide alternative. Keep the Damnation and Lies splinters equipped and the 15% Experience Well buff running, then speed-farm the zone. Clear every elite pack, close ruptures and rifts, and summon the Splinter Echo bosses.

This variant still hands out strong experience while also generating Aberrant Cinders and giving chances at Mythic and Legacy unique drops. It is slower for pure Paragon than the Undercity loop, but it doubles as a gear and materials session.

How to confirm the farm is working

You will see the results in real time. In the Undercity, each Attunement rank should spray a visible cluster of experience orbs, with individual popups climbing into the millions at high Torment. In Infernal Hordes, watch the Damnation stack counter tick up per elite pack and your Monster Power rise alongside it. A properly stacked Infernal Hordes run should move your Paragon bar by more than a full level, and checking the Paragon board after the run confirms the jump.