All Hardmode Bosses

Introduction
NOTE: This guide simply explains the requirements and how to summon each boss NOT a guide on how to defeat them.
( im finally not lazy,took more than an hour to make this >:( and cuz i felt like people needed this kinda)
DISCLAIMER: None of the boss images are made by me, I got them from the Terraria Wiki.

Mechanical Menaces

The Twins are a Hardmode mechanical boss which is essentially a more difficult version of the Eye of Cthulhu. The Twins are two separate flying entities, Retinazer and Spazmatism, connected by a tendril, each with its own attack pattern and life count. Both must be killed in order to defeat the boss.
Crafting:
Lens (3)
Any Iron Bar (5)
Soul of Light (6)



Skeletron Prime is a Hardmode mechanical boss which is essentially a more difficult version of Skeletron. It consists of a head and four limbs, but, similar to Skeletron, only the head needs to be defeated to defeat the boss.
Crafting:
Bone (30)
Any Iron Bar (5)
Soul of Light (3)
Soul of Night (3)


The Destroyer is a Hardmode mechanical boss which is essentially a more difficult version of the Eater of Worlds. Like the Eater of Worlds, it is a very large worm. Although it appears to be similarly made up of many segments, individual segments cannot die, and The Destroyer will not split apart into multiple entities; its segments share a singular health pool. Like other worms, The Destroyer can take increased damage from attacks that damage multiple segments at once.
Crafting:
Rotten Chunk (6)
Any Iron Bar (5)
Soul of Night (6)
OR
Vertebrae (6)
Any Iron Bar (5)
Soul of Night (6)

Duke Fishron

Info: He drops some of the best weapons in the game and the best wings.

Item Summon: Cast a fishing pole of any kind into 1 of the 2 ocean biomes with a Truffle Worm as bait. Truffle Worms are an uncommon find in the underground Mushroom Biomes during Hardmode and must be caught with a bug net.

Plantera

Info: Plantera is the next hardest boss after Skeletron Prime. It drops incredible weapons and tools and grants access to the Jungle Dungeon. It will also spawn the Cyborg NPC if you have an empty NPC house.

Item Summon: Plantera can be summoned by smashing one of Plantera's Bulbs in the jungle. Plantera's Bulbs spawn naturally around the jungle after the Mechanical Bosses have been defeated and have the appearance of a large pink flower.

Golem

Info:The Golem drops insanely good weapons along with Beetle Husk, allowing you to make one of the best armors in the game. He is also very difficult, but being fast can help in battle.

Item Summon: Using a Lihzahrd Power Cell on the Lihzahrd Altar located at the bottom of the Jungle Dungeon. This can only be done after Plantera has been defeated.
How To Craft: Uncraftable, only found in Lihzahrd Chests or a 1/50 drop chance from Lihzahrds.

Ocram (Consle only)

Info: The Ocram is the hardest boss in the console version of Terraria.He has an attack style similar to the Eye of Cthulhu.

Item Summon: Use a Suspicious Looking Skull at night.
How To Craft:
1 Mechanical Skull
2 Mechanical Eyes
10 Adamantite Bars
5 Soul of Light
5 Soul of Night

Queen bee

Queen Bee
Info: One of the new bosses introduced in the 1.2 update. It is the first jungle boss and sometimes considered the hardest before WoF. I personally think it is easier than Skeletron however. She is a great way of making money as you can generally make 5-10 gold per kill selling all drops.

How To Naturally Summon: She can be summoned anytime by breaking a Larva found in a Hive, an uncommon mini biome, in the Underground Jungle.

Item Summon: You can summon her anytime using an Abeemination anywhere in the Jungle.

How To Craft:
5 Honey Block
1 Stinger
5 Hive
1 Bottled Honey

Lunatic Cultist

The Lunatic Cultist is summoned by killing the four cultists, which spawn outside of the dungeon after Golem is defeated. When the Lunatic Cultist is defeated, the Lunar Events begin.
While the Lunatic Cultist has only one stage, its attacks become more powerful as it loses health. The Lunatic Cultist flies around randomly, cycling between shooting fireballs, creating a ball which shoots lighting in a circle, shooting a giant snowflake which shoots ice shards at the player, shooting shadowflames, and shooting five destructible projectiles twice in a row. The Lunatic Cultist will also create fake copies of itself, which will summon a Phantasm Dragon when damaged. If a Phantasm Dragon is still alive and the player damages these copies, it will summon an Ancient Vision instead. Waiting too long to attack the real Lunatic Cultist will also cause the Phantasm Dragon or Ancient Vision to be summoned. In Expert Mode, the Lunatic Cultist will spawn Ancient Doom along with its other attacks

Trophy:

Event Minibosses

The Pumpking is a mini-boss also found later in the Pumpkin Moon event. Multiple Pumpkings can be out at the same time, up to six at the final fifteenth wave (or even more in multiplayer). It has three modes of attack, indicated by the face carved in the pumpkin it uses as a head.

Martian Saucer is a large flying boss that spawns during the Martian Madness event.
The Martian Saucer moves through blocks, and has four turrets with independent health meters that must each be destroyed before damaging the saucer itself becomes possible. The turrets include two rocket launchers and two laser machine guns. In addition, the saucer itself fires a large beam ("death ray") that can only fire directly downward, and which cannot be destroyed independently. The player can damage the core only if all four turrets have been destroyed.

Everscream is a mini-boss that can be found during the Frost Moon event, and acts much like the Mourning Wood. The biggest difference is that its projectiles can not go through blocks.

Flying Dutchman is the boss of the Pirate Invasion. It will initially spawn after 65% of the invasion is completed.It has four cannons that must be destroyed before it can die. The Flying Dutchman does not disappear after the invasion is over, but it will explode if it has not been engaged before said ending occurs. Several Flying Dutchmen can appear at once.

Ice Queen is the third and final boss that appears during the Frost Moon event. She has three alternate attacks. She drops items like the Baby Grinch Mischief's Whistle, Reindeer Bells and also endgame weapons for each class.One attack includes her firing arcs of ice whilst flying back and forth above the player. Her second attack (and the best time to attack her) is her spinning around and shooting icicles in a circle.

Santa-NK1 is a mini-boss that appears during the Frost Moon event. Some of its attacks go through blocks. He can drop the Chain Gun and the Elf Melter, which are both great weapons for ranger characters.

Mourning Wood is a mini-boss that spawns during the Pumpkin Moon. Like many other bosses, it has the ability to move through necessary blocks. It shoots flaming projectiles, some of which pass through blocks. This is the main difference between the Mourning Wood and the Everscream, a Frost Moon mini-boss. It also spits flaming spikes out of its head which stay on the ground for a while, dealing fire damage on contact.

Moon Lord

The Moon Lord is the final boss of Terraria as of version 1.3.0.1, and drops a majority of the endgame items, such as the Meowmere. It also drops the end-game ore, Luminite, used to craft many endgame armor sets and tools. He is summoned by defeating all four of the Celestial Towers from the Lunar Events, or by using a Celestial Sigil. He has a combined health of 145,000 (217,500 in Expert Mode), the most health of any boss in the game.

The Moon Lord has two hands and a head which must be killed by attacking the eyes on them, and when killed will release invincible True Eyes of Cthulhu. When the three eyes are destroyed the Moon Lord's core opens up on his chest, which must then be destroyed to defeat the boss.

The Moon Lord's hands shoot two projectiles at once which home onto the player, and summon phantom versions of the True Eye of Cthulhu and throwing them at the player. The Moon Lord's top eye will occasionally fire a Phantasmal Deathray that will sweep across the entire screen. Being very deadly to players, it can be avoided by hiding under solid blocks or by trying to escape its wrath on a flying mount. When the True Eyes of Cthulhu are released, the places where they used to be will inflict minor contact damage. The True Eyes of Cthulhu will fire many of the same attacks as they did when they were still enclosed within the Moon Lord, but be a little less damaging. In Expert mode, the Moonlord's Phantasmal Death Ray attack deals a TON more damage, which is enough to kill a player in one shot.

Suggestions!

I hope this guide helped you! if you have suggestions i would gladly like to hear them!

[[CK] Plant :3]

thanks

[Extra Creamy]

it spawns in the solar eclipse after all mechanical bosses are defeated

[[CK] Plant :3]

what about mothra...I know she technicly isnt a boss but I cant figure out how to find her or summon her

[Extra Creamy]

this was a while ago

[daflac]

But thanks

[daflac]

It's still pre-hardmode

[daflac]

WOF isn't either

[daflac]

Brain of cthulu isnt a hardmode boss

[MalTheChaosFish]

*mechanical bosses

[MalTheChaosFish]

Queen bee and Brain of Cthulhu are not hard mode, the mechanical monster are not on this, and could you put them in the order of progression? it goes: Mechanical bosses, plantera, golem, duke fishron, lunatic cultist, moon lord, then event minibosses