Hero SiegeGuide

Hero Siege Uber bosses: how to open each fight and what drops

Three new Uber bosses with 24 Heroic items, and the classic Ubers behind keys and fragments. How to open every fight.

An illustration of a huge horned skull with glowing red eyes above three stone tablets

Season 10 added three Uber bosses to Hero Siege: Phantom Leviathan, Captain Grimtide and the Blood Maiden. Each drops a share of 24 new Heroic items, and each needs a tablet that drops in Act 9. The older Ubers, from Damien to Gabriel, still work through keys and fragments. Here is how to open every fight.

The short version

  • The new Ubers need tablets from Act 9 dungeons, used on a sealed door at the end of the dungeon.
  • Patch 7.0.13 raised the tablet drop chance from 1 in 5,000 to 1 in 2,700.
  • Leviathan's Ribcage and Ghost Armada from Phantom Leviathan have sold for millions of gold.
  • Treat the new Ubers as Inferno content.
A Hero Siege character in the middle of a large fight in Chaos Tower with fire effects filling the screen
A Chaos Tower fight in Season 10. Area damage and staying alive decide how far you push.

The three new Uber bosses

BossTablet and whereLoot themeNotable drops
Captain GrimtideTablet of Armada, Skull Cave in Shipwreck CovePhysical and meleeGhastly Skull, Captain's Anchor, Ethereal Musket
Blood MaidenTablet of Parasite, Belly of the Beast in Tormented ReefDamage over time, poison, summonsInfected Grasp, Parasitic Heart, Jar of Parasites
Phantom LeviathanTablet of Leviathan, Boreal Cave on Boreal IslandGeneral and defensiveLeviathan's Ribcage, Ghost Armada, Leviathan's Crown

Captain Grimtide is fragile, so a character that survives a few hits kills him quickly. The Blood Maiden's tablet is the cheapest on the market and Phantom Leviathan's the most expensive. All 24 new items require level 100. Details from Metaroad's Uber bosses guide.

Farming tablets

Tablets drop while clearing the matching Act 9 island. Since 7.0.13 they drop about twice as often as at launch. Before that patch, one player averaged a tablet every 50 to 60 minutes. An Eternal Battlefield Ether setup while clearing the island helps, as the Ether Tree guide explains.

The classic Ubers

BossHow to open
DamienCraft a Key of Terror from Act I to VI boss parts and talk to Um
Shadow ReaperCollect Dimensional Shards in the Shadow Realm, then enter its portal
Sung LeeCollect Battle Fragments around the Eternal Battlefield portal
King RakhulUse Colosseum Fragments on the last floor of a Chaos Tower
GabrielMerge three prime evil souls into a Soul of Hatred
Amun-RaCraft an Ankh of Eternal Death
Architect of RuinCraft a Signet of Existence from seven act fragments
EndrixiaCraft a Ruby Key, or find her through Ruby Chests
Sheep KingThrough Sheeponia

Infernal versions of the key based Ubers use their own items, such as the Key of Infernal Terror. Patch 7.0.13 also raised Architect fragment drops to 1 in 20. Gabriel and Amun-Ra are part of the 5th relic slot quest, and Endrixia drops Unholy and Angelic charms.

Selling Uber drops

The new Heroic items are some of the most expensive things on the market this season. Check prices before you equip or salvage anything, as our trading guide explains.

Common questions

What are the new Uber bosses in Hero Siege Season 10?

Phantom Leviathan, Captain Grimtide and the Blood Maiden.

How do you get Uber tablets?

They drop in Act 9 dungeons on the matching island, about 1 in 2,700 since patch 7.0.13.

Which Uber boss is easiest?

Captain Grimtide is the most fragile of the three new ones.