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Bosses
Ultranium adds 8 new bosses and 1 new miniboss throughout the game’s progression with unique AIs and challenging fights. They generally drop weapons along with a material used to craft new and strong equipment.
Contents
Pre-Hardmode Bosses [ ]
Zephyr Squid [ ]
The Zephyr Squid is a giant strangely colored squid with 3,800 (4,300) health that is fought in the Ocean biome. It is intended to be fought after the Eater of Worlds or the Brain of Cthulhu. Squid is summoned by fishing with the Coral Bait while in the Ocean biome. It attacks the player with two different projectiles that have their own unique properties.
The Zephyr Squid drops water-themed weapons and Zephyr Scales, which are used to craft its gear. In Expert Mode, it also drops the Zephyr Squid’s Tentacle, increasing critical strike chance by 10%.
Glacieron [ ]
Glacieron is a menacing ice dragon with 5,200 (6,300) health that is fought in the Snow biome, which can be summoned with the Frozen Food while in the Snow biome. It dashes at the player, fires varying ice projectiles, and will summon heavy blizzard when entering phase 2.
Glacieron drops snow-themed weapons and Glacial Pelts, which are used to craft various items. In Expert Mode, it also drops the Glacieron Talon, which increases armor penetration by 10.
Hardmode Bosses [ ]
Dread [ ]
Dread is a strange monstrous alien with 14,000 (17,500) health that is fought before or alongside the Mechanical Bosses. It is summoned with the Beacon of Fear during nighttime. The boss is split into two phases: the first functioning similarly to Plantera and the second shedding its hooks, becoming airborne, and starting to directly attack the player.
Dread drops fear-themed weapons which can also be crafted with Dread Flame and Dread Scales. In Expert Mode it also drops the Core of Fear, which causes all projectiles to inflict the Dread debuff.
Xenanis [ ]
Xenanis is an ethereal demon with 52,000 (63,000) health that is fought after Plantera. It is summoned with the Ethereal Lantern at nighttime. Xenanis uses various attacks, such as firing lasers in random directions and summoning portals that fire at the player.
Xenanis drops ethereal-themed weapons and some Ethereal Flesh, which is used to craft its gear, such as weapons, wings and armor. In Expert Mode, it also drops the Xenanis’ Core, increasing damage and crit by 15% when below half health.
Post-Moon Lord Bosses [ ]
Ultrum [ ]
Ultrum is the guardian of nature with 220,000 (380,000) health that is fought alongside Ignodium. He is summoned by using the Ultranium Sigil on the surface. Ultrum gains attacks and changes his behavior as his health decreases, including redirecting bolts, spiraling blasts, and walls of projectiles.
Ultrum drops Ultranium-themed weapons and Ultrum Essence Shards, which are used to craft his weapons and Guardian items when used in conjunction with Ignodium Essence Shards. In Expert Mode, he also drops the Ultrum Relic Shard, which is used to craft the powerful endgame item, Guardian’s Insignia.
Ignodium [ ]
Ignodium is the guardian of Hell with 220,000 (380,000) health that is fought alongside Ultrum. He is summoned by using the Nether Beacon while in The Underworld. He attacks using flame blasts while occasionally charging at the player. At 50% health, Ignodium gains new attacks, such as using molten globs and horizontal walls.
Ignodium drops molten-themed weapons and Ignodium Essence Shards, which are used to craft his weapons and Guardian items when used together with Ultrum Essence Shards. In Expert Mode, he also drops the Ignodium Relic Shard, which is used to craft the powerful endgame item, Guardian’s Insignia.
Absolute Dread [ ]
Absolute Dread is a giant, even more, monstrous alien, with 280,000 (400,000) health, and is fought after both Ultrum and Ignodium have been defeated. It is summoned with the Beacon of Fear during nighttime after Ultrum and Ignodium are both defeated. The boss is a rematch of Dread, but more powerful.
Erebus [ ]
Erebus is an Eldritch Worm with 385,000 (450,000) health, being the final (?) boss of Ultranium. It is summoned either at the end of the Abyssal Armageddon or with the Eldritch Worm Food during the Abyssal Armageddon event. It dashes across the screen and fires a lot of projectiles at the player, as well as teleporting to its realm in order to create ghastly clones.
Erebus drops shadow-themed weapons and Erebus Scales, which are used to craft endgame items, including Erebus’ drops when used in conjunction with Tenebris Alloy and Other-Worldy Essence. In Expert Mode, it also drops the Heart of Erebus, which increases various stats as the player loses health.
Minibosses [ ]
Mind Flayer [ ]
Mind Flayer is a giant flayer wraith with 100,000 (200,000) health that spawns once during the Abyssal Armageddon Event. It attacks the player by moving quickly towards them and using various projectiles.
The Mind Flayer drops eldritch tentacle-themed weapons and Mind Flayer Blood, which is used to craft the Mind Flayer’s drops and some other weapons. In Expert Mode, flayer also drops the Mind of the Mindflayer, which increases damage, gives you a special damaging aura and other bonuses.
Ultrum
Type | Boss |
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Environment | Surface |
AI Type | Ultrum AI |
Damage | 50 / 100 |
Max Life | 220,000 / 380,000 |
Defense | 50 |
KB Resist | 100% |
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Ultrum is a Post-Moon Lord boss intended to be fought after Moon Lord alongside Ignodium.
While Ultrum is alive, the Guardians phase 1 music will play in phase 1 of the fight and Guardians phase 2 will play in phase 2 of the fight.
Contents
Summoning [ ]
Ultrum does not spawn on its own and is summoned by using an Ultranium Sigil on the Surface. If brought Underground, it will despawn.
Behavior [ ]
Phase 1 [ ]
Ultrum slowly chases after the player while firing spreads of green bolts that fly a certain distance before redirecting themselves at the player. Every time he fires 5 spreads, he will stop in place and use one of several alternative attacks in a cycle.
Below 50% HP, Ultrum briefly goes invulnerable and transitions into Phase 2.
Phase 2 [ ]
Ultrum starts using a newer, enhanced attack pattern.
Phase 3 [ ]
At roughly 12.5% HP, Ultrum briefly goes invulnerable, stops moving normally, and releases a desperation attack.
Dread
Type | Boss |
---|---|
Environment | Surface |
AI Type | Dread AI |
Damage | 55 (First Phase) / 60 (Second phase) |
Max Life | 18,500 / 22,000 (Second phase) |
Defense | 65 (Second phase) |
KB Resist | 100% |
Inflicts debuff | |
Debuff tooltip | Pure fear pulses through your body. Reduced defense and attack damage |
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Not to be confused with Absolute Dread
Dread is a Hardmode boss intended to be fought before the Mechanical Bosses.
Contents
Summoning [ ]
Dread does not spawn on its own and is summoned by using a Beacon of Fear at nightime.
Behavior [ ]
Phase 1 [ ]
Dread behaves similarly to Plantera in phase 1, moving slowly towards the player while cycling through its attacks. It has 4 hooks with 2,500 / 5,000 HP each.
Phase 2 [ ]
Dread now flies around the player while cycling through its various attacks in a set pattern;
Aftermath [ ]
Summons [ ]
Template:Ultranium/Master Template Characters
Class setups
This page is under construction. It is currently missing a lot of information.
The Ultranium Mod decently expands on each of the 4 classes, Melee, Ranged, Magic and Summoning. Ultranium also adds quite a few difficult Bosses, so each build here, while giving a good baseline, should be optimized depending on the boss you’re fighting.
This guide will show the recommended weapons and equipment to use at each stage of the game, but as mentioned earlier, optimize the builds depending on what you’re fighting/doing.
Do note that Ultranium is a much smaller mod than Calamity or Thorium, meaning that, while Ultranium’s weapons can certainly get you through the game, it is also recommended to use weapons from Vanilla. This guide will only show Ultranium’s weapons unless a class doesn’t have many options in Ultranium, however. Please refer to the Class Setups Guide on the Official Terraria Wiki for more information.
Do note that, while you can get Hellstone stuff pre-boss as of 1.3.5, it will be getting fixed in 1.4 Tmod, so if you want to get it, do it, but this guide will not list Hellstone gear until Pre-Wall of Flesh.
Contents
Pre-Bosses [ ]
Work on gathering materials for the class you choose, Summoner has a much easier time due to a few more early game summon weapons. Blood Clots can be obtained from Blood Moon enemies, which craft into decently powerful early game items. Sanguine armor is a good armor choice for this stage of the game, as it grants bonuses for each class. Bosses in this section include King Slime & Eye of Cthulhu.
Xenanis
Type | Boss |
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Environment | Surface – Night |
AI Type | Xenanis AI |
Damage | 40 / 65 |
Max Life | 52,000 / 63,000 |
Defense | 50 / 65 |
KB Resist | 100% |
Inflicts debuff | |
Debuff tooltip | Losing Life |
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Xenanis is a Hardmode boss intended to be fought after Plantera.
Contents
Summoning [ ]
Xenanis does not spawn on its own and is summoned by using an Ethereal Lantern at nighttime. The boss will flee if it becomes daytime while it’s active.
Behavior [ ]
Xenanis typically chases the player while shooting projectiles at them, occasionally teleporting to positions around them to perform certain attacks.
Phase 1 [ ]
Xenanis uses attacks in a fixed cycle.
Xenanis enters Phase 2 at 50% HP.
Phase 2 [ ]
Xenanis summons two massive purple portals to the player’s sides. After a few seconds, two Xenanis Apparitions appear from the portals and attack. Until the Apparitions are slain, Xenanis will hover above the player, passive and invulnerable.
When the Apparitions are slain, Xenanis reactivates and starts using an enhanced variant of his previous attack cycle.
Summons [ ]
Appearance | Name | Conditions |
---|---|---|
File:Xenanis Apparition (Ultranium).png | Xenanis Apparition | When entering Phase 2 |
File:Xenanis Apparition (Dark) (Ultranium).png | Xenanis Apparition (Dark) | When entering Phase 2 |
Template:Ultranium/Master Template Characters