Live countdown to the next world boss spawn — plus per-boss timers, a weekly cache tracker, and the Season 15 Annihilus hunt guide.
Schedule rule: one world boss every 3.5 hours (210 minutes), counted from the verified anchor spawn at . Next spawn in UTC: . Last spawn: Avarice at .
World bosses are open-world raid fights for up to 12 players. Every 3.5 hours one of four bosses — Ashava the Pestilent, Avarice the Gold Cursed, Wandering Death or Azmodan, Lord of Sin — appears in one of seven arenas for a 15-minute fight that pays out Legendaries, Scattered Prisms and a weekly Grand Cache.
Spawns are mathematically fixed: one every 210 minutes from the verified anchor spawn at . Each day's spawns land 30 minutes later than the day before, and the 48-spawn schedule repeats every 7 days. See the 7-day spawn schedule.
Bosses rotate in pairs: Wandering Death ×2 → Avarice ×2 → Ashava ×2 → Azmodan ×2, a 28-hour cycle. The next predicted boss is Avarice the Gold Cursed at Fri, Oct 9, 00:00 UTC. The first spawn of each pair is labelled "predicted". Read the full rotation order or see who spawns next.
Times are converted to your device's zone automatically. Pin a fixed zone in the timer, or open the pages for UTC, Pacific, Eastern, Central European and China Standard Time.
Each card counts down to that boss's next predicted spawn. Click a name for its full timer page.
Spawn times are fixed; the boss is predicted from the rotation and zones are confirmed in-game one hour before. Full 7-day schedule.
| # | Spawn time | Boss | Confidence |
|---|---|---|---|
| ▶ | Avarice the Gold Cursed | next | |
| 2 | Ashava the Pestilent | predicted | |
| 3 | Ashava the Pestilent | on cycle | |
| 4 | Azmodan, Lord of Sin | predicted | |
| 5 | Azmodan, Lord of Sin | on cycle | |
| 6 | Wandering Death | predicted | |
| 7 | Wandering Death | on cycle | |
| 8 | Avarice the Gold Cursed | predicted | |
| 9 | Avarice the Gold Cursed | on cycle | |
| 10 | Ashava the Pestilent | predicted | |
| 11 | Ashava the Pestilent | on cycle | |
| 12 | Azmodan, Lord of Sin | predicted |
One Grand Cache per boss per week. Tap a boss when killed — saved in your browser.
4 of 4 weekly Grand Caches remaining — resets Thursday.
Key mechanics for each ~15-minute, 12-player fight.
Poison-themed dragon. Drops the Ashava Barding mount armor.
Greed made flesh. Drops the Treasure Beast Barding.
Towering undead horror. Drops the Bone-Caged Barding.
The newest world boss. Weekly first kill grants Azmodan's Spoils (Exquisite Blood, Tributes, Runes).
Every boss timer, schedule, rotation and time-zone page in one place.
Since patch 3.2.2, some world boss kills trigger a secret follow-up fight. Here's the community-verified loop.
Blizzard has not officially confirmed the trigger. Community theory (unverified): the instance's combined total of salvaged Stones of Jordan (~125, possibly ~75) gates the spawn — the count can be split across players, so you can luck into one. The "Black Mushroom" theory is unproven. Drops reported on Torment 7 and 10 — T12 is not required. Not every world boss kill triggers it.
World bosses spawn every 3.5 hours (210 minutes); 48 spawns later (exactly 7 days) the schedule repeats.
Spawn times are fixed. Which boss follows the 2× rotation, but at boundaries even top trackers disagree — those spawns are labeled "predicted".
One per boss per week (resets Thursday). Legendaries with a Unique chance — better on higher Torment. All 4 bosses = 4 caches weekly. Use the tracker above.
The most reliable source of Scattered Prisms, used to add gem sockets to gear.
Guaranteed Legendary+, 5 Whispers progress, boss-exclusive mount armors (Bardings), and — in Season 15 — a chance at the Echo of Uber Diablo fight.
One arena per zone; the map icon one hour before confirms which.
More answers on the full FAQ page.
The last three spawns (UTC). Browse all 4 world bosses.