The 12 Eyes in Legendary Monsters are thrown to find the structure each boss lives in, the same way an 
Eye of Ender leads you to a Stronghold. They’re cheap to craft, as nearly all of them are 4 of a common block around an 
Ender Pearl. The Eyes don’t summon anything though, they only find the structure, and the boss will already be waiting inside.
The only boss that has to be summoned is The Obliterator, which is done with an Eye Crystal at the 
Teleport Machine in the Space Station. So there’s really two systems here, the Eyes to find the fights and the Teleport Machine to start the last one. Both are covered below, along with where each Eye leads and what you’ll find when you get there.
How It Works
Throwing and Following an Eye
To use an Eye, right-click with it in your hand and it will fly off toward the nearest structure of its type, then drop back down after a few seconds. Follow it, throw it again, and keep going until it hovers over the same spot. It can search up to 100 chunks in every direction, so if the Eye doesn’t fly at all, there’s nothing of that kind within range.
With cheats enabled, /locate structure legendary_monsters:collapsed_kingdom will give you the coordinates of the nearest Collapsed Kingdom straight away, and the same works for any structure in the table below. On a server without cheats, the Eyes are the only way.
Every throw uses up the Eye, although like an Eye of Ender it will usually drop back down as an item to be picked up again. Around 1 in 5 throws will shatter it instead, so craft 3 or 4 before setting off. The Eyes only work in the dimension their structure is in, so the 
Eye Of Annihilation goes in The End and the rest in the Overworld.
The 12 Eyes and Their Recipes
There’s an Eye for every structure in the mod apart from the Warped Fungussus Nest, which doesn’t have one. Eleven of them use an Ender Pearl in the middle, and the ingredient around it always matches the structure, so 
Snowballs make the 
Eye Of Frost and 
Magma Blocks make the 
Eye Of Magma.
The Eye Of Annihilation is the odd one out. It needs an Eye of Ender in the middle and 4 
Enderitium Gems around it, which you’ll have to mine from 
Enderitium Ore in The End, so it can’t be made until you’ve been there.
| Eye | Made With | Leads To | Boss Inside |
|---|---|---|---|
| Eye Of Bones | 4 Bone + Ender Pearl | Skeletosaurus Nest | Skeletosaurus |
| Eye Of Many Ribs | 4 Dripstone Block + Ender Pearl | Ancient Stronghold | Ancient Guardian |
| Eye Of Shulker | 4 End Stone + Ender Pearl | Shulker Tower | Shulker Mimic |
| Eye Of Ghost | 4 Soul Torch + Ender Pearl | The Collapsed Kingdom | Possessed Paladin |
| Eye Of Moss | 4 Moss Block + Ender Pearl | Mossy Temple | Overgrown Colossus |
| Eye Of Air | 4 Feather + Ender Pearl | Cloudy Temple | Cumulonimbus |
| Eye Of Sandstorm | 4 Sandstone + Ender Pearl | Ruined Pyramid | Dune Sentinel |
| Eye Of Frost | 4 Snowball + Ender Pearl | Frostbitten Temple | Frostbitten Golem |
| Eye Of Soul | 4 Soul Sand + Ender Pearl | Soul Fortress Remains | Withered Abomination |
| Eye Of Magma | 4 Magma Block + Ender Pearl | Lava Eater’s Nest | Lava Eater |
| Eye Of Chorus | 4 Chorus Fruit + Ender Pearl | Ancient Tower Remains | Chorusent |
| Eye Of Annihilation | 4 Enderitium Gem + Eye of Ender | Space Station | The Obliterator, once summoned |
Most people go looking for the 
Eye Of Ghost first, as the Possessed Paladin is the mod’s best known fight, and the 
Soul Torches are what catches people out. You’ll need 
Soul Sand or 
Soul Soil from the Nether to make them, so you can’t find a Collapsed Kingdom with an Eye until you’ve been there. The 
Eye Of Shulker is the same story with 
End Stone.
Bosses Are Already in Their Structures
Once the Eye has led you to the structure, there’s nothing to summon. Every boss apart from The Obliterator is placed inside its structure when the world generates, so you’ll find the Skeletosaurus in its nest, the Overgrown Colossus in the Mossy Temple and so on. Some of them are asleep until you get close, like Cumulonimbus, who won’t wake up until a player comes within 8 blocks.
This also means you can’t fight the same boss twice in the same structure. Once it’s dead it stays dead, and the only way to fight another one is to find another copy of the structure with a fresh Eye.
How far that might be depends on the structure. A Skeletosaurus Nest or a Lava Eater’s Nest is placed every 25 chunks or so, whereas the Collapsed Kingdom and the Space Station are around 110 chunks apart. For the big ones, take everything the first fight drops rather than planning on a second.
The Teleport Machine and the Eye Crystal
The Obliterator is the exception to all of this, as he doesn’t exist until you summon him. In the main section of the Space Station there’s a Teleport Machine, and when you walk up to it a message will appear on your hotbar telling you to insert an Eye Crystal.
Right-click the machine with the Eye Crystal in your hand and it’s used up. The machine will shake and glow for a few seconds, then The Obliterator appears just above it, and he can’t be hurt until his arrival animation has finished.
Where the Eye Crystal Comes From
You’ll only get an Eye Crystal from the Annihilation Pursuer, which is a miniboss that lives in the same Space Station as the machine. It drops exactly 1 Eye Crystal every time, along with 2 to 10 Enderitium Gems, and none of it’s a chance roll.
Annihilation Pursuer Drops
Eye Crystal There are three Pursuers in every station, asleep in different sections, so one station gives you three Eye Crystals and three attempts at The Obliterator. Since they’re asleep when you arrive, you can take them one at a time and pick when each fight starts.
The Eye Crystal is also an ingredient in the 
Buckler Of Annihilation, which needs 1 of them along with 6 Enderitium Gems and 2 End Stone. If you craft the Shield first, there’s no Eye Crystal left to summon The Obliterator with, and the next one is a whole Space Station away.
Unlike the other bosses, The Obliterator can be summoned as many times as you like from the same machine, as long as you have another Eye Crystal each time. The machine never wears out, it just won’t work while it’s already charging. If he’s left alone he’ll heal back to full, and he won’t disappear either, so a failed attempt doesn’t cost you the Eye Crystal, only the fight.
Tips
Craft the Eye for the structure you actually want before you leave, as most of them cost a single Ender Pearl and four cheap blocks, and throw one from each new biome edge rather than walking a grid. Keep the Eye Crystals for the Teleport Machine, since nothing else in the mod spawns a boss on demand.
Every boss is already asleep inside its structure when the chunk generates, so an Eye’s job ends at the door. Clearing the smaller mobs first is worth more than any summoning trick, because the boss wakes when you get close, not when you want it to.
FAQ
The Eye Of Ghost leads you to the nearest Collapsed Kingdom, which is the structure the Possessed Paladin is found in. It’s crafted from 4 Soul Torches placed around an Ender Pearl, and you throw it and follow it like an Eye of Ender. It doesn’t summon the Possessed Paladin, as he’s already inside the kingdom waiting for you.
Eye Crystals drop from the Annihilation Pursuer, the miniboss inside the Space Station in The End, and they can’t be crafted or found in 
Chests. Each kill gives you exactly 1, and every Space Station holds three Annihilation Pursuers. The crystal is what you insert into the Teleport Machine to summon The Obliterator.
They don’t, the Eyes only point you toward the structure, in the same way an Eye of Ender points to a Stronghold. Every boss except The Obliterator is already inside its structure when the world generates, so once you’ve arrived the fight is just a matter of walking in. The Obliterator is the only one that needs summoning, and that uses an Eye Crystal rather than an Eye.
The 
Eye Of Many Ribs leads to the Ancient Stronghold, where the Ancient Guardian is fought. It’s made from 4 
Dripstone Blocks around an Ender Pearl, which is the part people miss, as the name makes it sound like it should be made with 
Bones. Bones make the 
Eye Of Bones instead, which leads to the Skeletosaurus Nest.
