Skeletron Prime

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Skeletron Prime
Skeletron Prime.png
Type Boss
AI Type Skeletron Prime Head AI
Damage 47
94 (while spinning)
Max Life 28000
Defense 24
48 (while spinning)
Knockback Resist 100%
Coins 12 Gold Coin
Item (Quantity) Rate
Soul of Fright.png Soul of Fright (20-40) 100%
Greater Healing Potion.png Greater Healing Potion (5-15) 100%
Hallowed Bar.png Hallowed Bar (15-35) 100%
Skeletron Prime Mask.png Skeletron Prime Mask 14.29%
Skeletron Prime Trophy.png Skeletron Prime Trophy 10%
For strategies on how to defeat Skeletron Prime, see Guide:Skeletron Prime strategies.

"You feel the air getting colder around you..."

Skeletron Prime is a Hardmode Mechanical Boss which is a much harder version of Skeletron. He can be summoned with the Mechanical Skull at night and players have until dawn to kill him. He can also randomly spawn at dusk if he has not been defeated yet, in this case his approach is signalled by "You feel the air getting colder around you" or "The air is getting colder around you".

Skeletron Prime has four limbs, each of which functions differently. The Prime Cannon fires flashing bombs that do not destroy blocks and isn't always pointed at a player. The Prime Laser shoots Death Lasers similar to those of Retinazer and The Destroyer, and is always pointed at a player. The Prime Saw and the Prime Vice swipe around, dealing large amounts of melee damage.

The four limbs are immune to the Poisoned and On Fire! debuffs, while the head is also immune to the Cursed Inferno debuff.

Skeletron Prime performs a headspin attack analogous to his lesser version. During this, his damage and defense double, unlike Skeletron whose defense reduces to 0. The Prime Saw homes in at players during this phase, even going hundreds of feet away in some cases. The Prime Vice, however, does not hone in during this phase.

Like Skeletron, if he is not dead by dawn he will begin to dish out instant kills and will take only 1 damage (2 for crits) from all attacks.


[edit] Arms

Prime Cannon
Prime Cannon.png
AI Type Prime Cannon AI
Damage 40 grenade
30 melee
Max Life 7000
Defense 23
Knockback Resist 100%
Prime Saw
Prime Saw.png
AI Type Prime Saw AI
Damage 56
Max Life 9000
Defense 38
Knockback Resist 100%
Prime Vice
Prime Vice.png
AI Type Prime Vice AI
Damage 52
Max Life 9000
Defense 34
Knockback Resist 100%
Prime Laser
Prime Laser.png
AI Type Prime Laser AI
Damage 25 death laser
29 melee
Max Life 6000
Defense 20
Knockback Resist 100%

[edit] Notes

  • While it is possible to continue the fight during the day without dying, Skeletron Prime will continually headspin and barely take any damage (1 damage per hit and 2 damage per crit). In addition, his headspins then become instant kills. Due to the similarities, this phase of his behavior is sometimes called the Dungeon Guardian phase. He will do this indefinitely, even if the next night comes before he's gone. It is possible to survive this with only Spectre Boots and Wings by flying in an infinity figure, though you will need to continuously move to accomplish this.
  • On large servers, if Skeletron Prime is still alive at the break of dawn, and is near the spawn point, he can go on a large killing spree. He will insta-kill everyone, then likely stay near spawn, catching anyone who tries to escape (In this state, he dashes forward at his victims, which makes him impossible to dodge). The only way to get rid of Skeletron Prime is to use admin powers to slay all NPCs (Killing all Monsters, Town NPCs and other Bosses at the same time), or lead him far away from anyone, in such a way he can't lock onto anyone (If you can hear the boss music, he can likely lock onto you, even if he is offscreen).
  • Even in this state, he often tends to lock onto someone who is far from the spawn (underground, or simply stranded in nature), kill the victim, then fly away due to the lack of targets. You CAN technically dodge his spinning head using gravity potions, if you are skilled enough.
  • The bombs fired by the Prime Cannon will not destroy blocks, and will only damage the player if they are standing on a solid block. They will also pass through wood platforms, effectively allowing the player to ignore the Prime Cannon as anything but a melee threat if using an arena built out of wood platforms.
  • If turtle armor is used, the reflection of melee damage onto Skeletron Prime's Day Phase will effectively 1-Shot him
  • If deep enough underground, Skeletron Prime will not come when the game says "You feel the air around you getting colder." or another line of text saying he is "coming". (unless you come up during the night of the day the game said that.).
  • Skeletron Prime can be the most profitable boss in the game, as the Souls of Fright can be crafted into Naughty Present to summon the Frost Moon, netting large amounts of money per 5 souls.
Anomaly: Occasionally, when summoned with the Mechanical Skull, Skeletron Prime does not appear. This is confirmed to happen in Multiplayer and Singleplayer. This might happen if you summon him too close to a house.
Bug : Occasionally, Skeletron Prime's head disappears randomly, ending the fight. Additionally when this bug occurs, some of his limbs will occasionally not disappear along with the head and will continue to fight (they will instantly die several seconds later due to Skeletron Prime's head being absent or if any damage is dealt to it/them).
Bug : Sometimes in multiplayer, when Skeletron Prime is summoned, he will suddenly die and give drops.
Bug : If you summon Skeletron Prime on a Floating Island, and teleport to a spawn point underneath the island, it will cause his limbs to disappear, and only have his head remaining to fight. A similar glitch can happen while fighting The Twins.
Bug : Occasionally Skeletron Prime will "flee" after one of his arms is defeated by floating down and de-spawning. It will then be considered morning in the game no matter what time of night it was when it happened. This happens in console and PC versions. This may be caused due to a desynchronization in time between client and server.
Bug : Often, bombs spawned by the Prime Cannon will not deal damage.
Bug : Bombs spawned by the Prime Cannon will destroy player-placed Living Wood, Living Wood Walls, and Leaves.
Bug : Sometimes, when summoned at the beginning of the night, Skeletron Prime will attack you as if it is daytime (instakill). This happens when the player tries to spam the summoning item.
Bug : Occasionally, Skeletron Prime does not spawn when the text announcing his awakening appears
Bug : Rarely, the message "You feel the air getting colder around you" will appear at 7:30 in the morning. If you summon the Twins, Skeletron Prime will summon with just two limbs.
Bug : Occasionally, as of Skeletron Prime instantly kills you.(Only tested on multiplayer)

[edit] Trivia

  • The Prime part of his name may be a reference to Optimus Prime from Transformers, the "Prime" suffix having become common for large robotic entities in fiction since. It may also mean the highest rank since Skeletron Prime is like an older brother or elder of Skeletron.

[edit] History

  • 1.2.3: Increased health, damage and defense of most parts. May now drop Skeletron Prime Mask
  • 1.2:
    • Now has a chance to spawn during hardmode with the message: "You feel the air getting colder around you...".
    • Will now drop 20-40 Souls of Fright, instead of 20-30. Also has a chance to drop Skeletron Prime Trophy.
    • Health, damage and defense of all parts and head reduced.
  • 1.1: Introduced.
Blue Slime.png Pre-Hardmode Enemies • Pixie.png Hardmode Enemies • Goblin Warrior.png Event Enemies • Golem.png Bosses • Bunny.png Critters • Guide.png Friendly NPCs • Baby Dinosaur.png Familiars
Pre-Hardmode King Slime • Eye of Cthulhu (Servant of Cthulhu) • Eater of Worlds • Brain of Cthulhu (Creeper) • Queen Bee • Skeletron (Dungeon Guardian) • Wall of Flesh (Leech) • Mobile-phone-icon.png Lepus (Diseaster Bunny)
Hardmode The Twins • The Destroyer (Probe) • Skeletron Prime • Plantera • Golem • Console only.png Ocram
Pumpkin Moon Mourning Wood • Pumpking
Frost Moon Pc only.png Everscream • Pc only.png Santa-NK1 • Pc only.png Ice Queen