I just got into Hard Mode and I have a Skeletron Prime summoning item. I was wondering how to kill him so I can progress. I will welcome any ideas.

  • 1
    What type of information are you after? Weapon/armour recommendations? Fighting strategies?
    – MC ΔT
    Commented Feb 3, 2016 at 8:02

9 Answers 9


Before Skeletron Prime

Skeletron Prime isn't the easiest of all the three mechanical versions of bosses. Saying if he is the hardest or if The Twins is the hardest is subjective, but it's common sense that a proper arena make the battle against Destroyer easier than the others.

Break a few altars, at least 6, so that a minimum amount of ores are spread across your world. After that, try getting a third-grade ore armor. With a grappling hook, a small cave arena with proper healing items, and you're good to go.

After killing him, you can make a proper Weapon with Hallowed Bars if you couldn't get a good one.

A wing is highly recommended for the other 3 bosses. To make a wing, there are many basic recipes, but the common material is the Soul of Flight, a 100% drop from wyvern, that can spawn high on the sky and floating islands.


The arena can be built with a few platforms, 5 is enough, on the air, so that the bomb goes trough all platforms to the ground and doesn't hit you. Statues with timers, Heart Lantern and campfire for passive health generation. If you are not playing alone, the players that is not aggroing the boss can take quick jumps on a honey pool.


The armor that you used to defeat Destroyer is good enough. If you want a Hallowed set by farming Destroyer, would be good as well. As melee, don't even dare using swords without projectiles. The best weapon I can think of is the Bananarang, having at least 5 of them, since the number of it you have equipped is the amount of boomerangs that can be had active on the screen(you will probably get 2 or 3 the first time you get, so kill a few more clowns to get to 5).

As ranged, a Hallowed Repeater or a Megashark (using the Souls from Destroyer) is good enough.

As magic, the best spell against him would be Magnet Sphere, but this would be hard to get since Dungeon in Hard Mode is almost end game content. Meteor Staff would be the second in place for this battle, since he is flying, it would shouldn't be a problem to hit him. Since the nerf on the mana potions I highly recommend magic handcuffs and star statue.

The Battle

For the battle, there's not much you can do to avoid damage from the laser arm, just make sure to have good speed, your wings, healing and buff potions, and go for it. Focus on the the arms that actually shoot, and keep your distance to avoid contact damage, it's the biggest source of damage of the boss.

  • 1
    What? No Yo-Yo's? Blasphemy!
    – MrLemon
    Commented Feb 3, 2016 at 22:01
  • @MrLemon Unfortunately, Yoyos , and honestly any limited range melee weapon, tend to not be good enough for bosses.
    – Waterseas
    Commented Feb 3, 2016 at 23:02
  • The Hard mode dungeon is unlocked after defeating Plantera, so a magnet sphere wouldn't be available. I'd say use a ranged armour set with a Mega Shark, with Crystal or Cursed / Ichor Bullets. I also had 5 light discs when I first beat Skeletron Prime, but I wouldn't use that now. (The Bananarang is better anyway.) Commented Feb 17, 2016 at 17:06
  • @GeorgeWillcox there's restriction to hardmode dungeon? I thought that only the Jungle Temple was locked by Plantera. Man, I need to replay those things, spending too much time only on the end game is making me forget D:
    – DH.
    Commented Feb 17, 2016 at 17:21

Here's what I did for my first win against him.

  1. Hung out in the hallow and underground hallow to get a) Pixie dust b) Unicorn Horns c) Souls of light

  2. Made a few hallowed mimics to kill (chest + key of light - made from souls of light). Until I got a Daedulus bow.

  3. Made holy arrows from the pixie dust and unicorn horns. (I made about 1K, but that was overkill)

  4. Horizontal sky arena from two parallel platforms spaced a double jump apart. Quite long. Put a heart statue at one end and heart lanterns and camp fires placed along it.

  5. Summon and rain holy arrows down on him.

  6. Switched to different weapon when only head was left (I used yoyo but use whatever floats your boat.)

It was pretty safe and pretty quick. Just run back to the heart statue to get healed.

Used the same arena / strategy for all three mechanical bosses, worked pretty well in all cases.

Wasn't using anything amazing something like - Oraculum armor, obsidian shield, some basic wings (not really needed) and lightning boots - not even all reforged.


I killed Skeletron Prime with the Clockwork Assult Rifle. The the gun is a pretty rare drop from the Wall Of Flesh. The bullets that work best are cursed bullets and crystal bullets. The crystal bullets are slightly better because they can explode into shards. The shards will deal damage to the 4 limbs that are spinning around him. The cursed bullets will set fire to skeletron prime and will do 1 damage per millisecond for around 20 seconds. But the clockwork assult rifle is a good gun to save ammo. The minishark also works but isn't the best as it gets rid of the bullets way too fast. The clockwork rifle will turn one bullet into three. You don't really need a platform to kill skeletron prime because i play on the 3ds version. The 3ds version will let you target the enemy so when i do that all i have to do is to jump and press the attack button. I used demon wings but any wings are ok. so just start to fire those crystal bullets and youll kill skeleton prime in no time at all.

  • oh yeah, i forgot to tell you that skeletron prime is the easiest of the mechanical bosses for me.
    – user192370
    Commented Jul 20, 2017 at 0:12
  • 1 damage per millisecond? That's 1000 damage per second... You'd only need 3 bullets to kill Prime if that was the case. The Cursed Inferno debuff actually only does 6 damage per second, for 9 seconds (54 damage total).
    – Mage Xy
    Commented Jul 20, 2017 at 13:57

I have an interesting tactic to battle Skeletron Prime so I might as well share it here.


  1. Daedalus Stormbow
  2. Holy Arrow
  3. Ichor/Cursed Arrow
  4. Any hardmode range armour, use sets with reduce ammo consumption if holy arrow is limited.
  5. Any wing, easier if using those with highest vertical reach.
  6. Health Potions - always bring some in case, bring more if you are not confident
  7. Magic Quiver,Ranger Emblem - optional but helps

Reforging accessories to Warding prefix will give a total of 20(24 for expert) which helps a lot.

Any combat buff potion will help as long as you have it and want to use it here.


Only a single layer of platform is needed, build it more than 15 tiles above ground to maximise effect. Place as many Heart Statues wired to Trigger Plates, if less than 3 status are available, wire them(it) to a one second timer to generate as many hearts as possible during the fight.

Build a vertical rope upwards from the platform - I suggest rope since it is easiest to obtain, but any means to reach upwards is okay as long as it is not solid blocks. Place Campfire and Heart Lantern to cover as much area vertically as possible.


Hit with Ichor/Cursed Arrow first, once Skeletron Prime closes in on you, fly upwards - you may occasionally stop flying momentarily to increase air time but don't overdo it. While going up, use Holy arrows. Most of the arrows and stars will hit, doing large amount of damage.

Once you run out of flight, DO NOT slow fall. Drop as fast as you can to avoid getting hit this will buy time for potion cool down. While you are falling you can still use Ichor/Cursed Arrow to do some damage.

Once you reach the platform, grab all the Hearts from the statue(s) to heal and repeat the process all over.

During the change of direction, if you see the Head spinning or starting to spin, Do Not attempt to charge through, avoid it from the side and return to vertical combat. Alternatively you can charge into its Arms and go through the head during the immunity period but that is risky and I would not suggest.

If you find yourself fast enough you can switch between Ichor and Holy Arrows to maximise dps. Otherwise just use Holy Arrows purely.

Same tip as any boss fight - Do Not just use health potions when you are about to die, use it as long as it cannot heal you beyond full health. That will greatly increase your chances of survival.


To start, I suggest bringing your Daedalus Stormbow, along with holy or unholy arrows. If you are a magic user, I suggest getting all of your fallen stars, and turn them into mana stars to boost up your max mana. I also recommend using the following magic books; cursed, Ichor, or crystal storm, because they can do a good amount of damage. Make sure you have your armor (hallowed, palladium, or titanium amour) to help you in battle. Try to take on the destroyer first, then make more damaging weapons with his souls.


What I did? I killed the destroyer first (with my cutlass) and got the megashark/light discs. Then I used my new weapons and hallowed armor to kill the twins. With my souls of sight, I made a rainbow rod. It took a few tries, but with all of the appropriate gear (cursed bullets recommended) He died. Then I wasted the souls of fright left over from crafting the drax on a flamethrower.


the easiest arena is having 2 layers of platforms 50 blocks apart for wings to fly through. Have a hook as well just in case you can't fly up. Have heart lanterns, campfires, heart statues to provide healing.

For melee i either use chain guillotines or ice sickle with titanium armor with power glove, warrior emblem, and some buffs like wrath, lifeforce, regen, rage, well fed.and also have the sharpen table for armor pierce

for range its easiest with daedlus stormbow and titanium armor ez win. maybe archery potion but ya thats it and clockwork assult rifle for head.

for mage its either crystal serpent, crystal storm, sky fracture with golden shower/cursed flames. You can bring titanium or forbiden armor.You should also have magoc power potions, magic regen, mage emblem.

For summoner i recommend defeating twns first getting the optic staff and killing prime with it. You should have summoner potions and spider armor. You should also have the bewitching table for +1 minion and also some wrath potions and summoner emblem

You should have well fed as buff, a minion(imp, twins, pirate) a sentry(queen spider) and wings, boots(lighting or frostpark), shield(cobalt/obsidian),


I just used megashark with crystal bullets some lightning boots titanium armor (not rally needed if your good at dodging) just took out the saw and lazer and then focused on the head.It was easy.


If you go to the underworld in hardmode and find a shadow chest,(opened with a shadow key)there's a chance you will find a drax. The Drax is supposed to be made out of the three mechanical bosses souls. You can now mine Chlorophyte and get better armor.

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