To complete the Tremendous Tempests challenge in Path of Exile 3.28 (Mirage League), you must defeat 75 Tier 16 Map Bosses while the maps meet specific "juicing" criteria.

Tremendous Tempests(75)

Slay the Map Bosses of 75 Maps that are affected by an Atlas Astrolabe while are they Rare and Tier 16 with at least 150% Item Quantity.

1. Use an Atlas Astrolabe

The Atlas Astrolabe is a new endgame currency item in 3.28 that replaces or augments the old Sextant system.

• Application: Apply an Astrolabe to a map on your Atlas. This creates a Shaped Region (a colored "blob") in that quadrant of the Atlas.
• Requirement: The map you run must be inside this Shaped Region.
• Strategy: Running a map removes that specific map's influence but buffs the remaining maps in the region. You can use specific Atlas Keystones to modify this behavior if you prefer to chain-run a single layout.

2. Tier 16 Rare Maps

• Map Tier: Ensure your map is Tier 16. With the 3.28 Atlas rework, map items are no longer layout-bound; you can use any Tier 16 "Map" item to run your preferred layout.
• Rarity: The map must be Rare (Yellow). Use an Orb of Alchemy on a normal map or a Chaos Orb on an existing rare map to change its modifiers.

3. Reaching 150% Item Quantity

Achieving 150% Item Quantity (IIQ) on a T16 map usually requires a combination of the following:

• Map Quality: Use 4 Maven's Chisels on a normal (white) map to reach 20% quality before upgrading it to Rare.
• 8-Modifier Maps: Use a Vaal Orb on a Rare map. There is a chance it becomes "corrupted" and gains 8 modifiers, which significantly boosts the base IIQ.
• Atlas Passive Tree: Take all "Increased Effect of Explicit Modifiers on your Maps" nodes (often found in the center of the Atlas tree). These nodes multiply the IIQ already present on the map.
• Scarabs and Map Device: Use Fragments (like Sacrifice at Midnight) or specific Scarabs that grant additional quantity.
• Tempests: While the challenge name "Tremendous Tempests" refers to the system, having a Tempest active in the map (via certain Astrolabe types or map mods) can add a flat 30% IIQ.

4. Quick Checklist for Success

• Check Atlas: Ensure an Astrolabe is active on the map's region (look for the "Shaped" colored circle).
• Verify Tier/Rarity: Confirm the map is T16 and Rare.
• Check Mods: Press Tab inside the map and look at the top right. Ensure "Item Quantity" is at least 150%.
• Kill Boss: Only the final Map Boss kill counts toward the 75 required.