Unable to craft Mythril anvil and the Twins

How do I get the recipe for the mythril anvil? When I speak to guide and look on crafting it says I have all the ingredients but it won't let me build it when I need it.
The same goes for the twins, it won't let me make it when I have the stuff to do so
Best Answer
To make a Mythril Anvil, you need to have 10 Mythril bars in your inventory (made from 40 mythril at a furnace). Then, stand next to an iron or lead anvil and you will be able to craft it!
When you say you want to craft 'The Twins', I assume you mean their spawning item, the Mechanical Eye. This requires the Mythril Anvil to craft, so you will need to make that first.
You only need 3 lenses, 5 iron/lead bars and 5 soul of lights to craft the Mechanical Eye. Stand next to a Mythril anvil and you will be able to craft it!
If you are unable to craft these items, restart Terraria to make sure it is not broken.
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How do you craft the Twins in Terraria?
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. The Twins can be summoned manually using a Mechanical Eye at night (7:30 PM to 4:30 AM)....The Twins.TypeBossKB Resist100%Immune to3 more rowsHow do you summon the twins?
The Mechanical Eye is used to summon The Twins, the advanced and Hardmode version of the Eye of Cthulhu. It can only be used at night; using this item during the day will not spawn The Twins nor consume it.How do you make orichalcum anvil?
Mythril or Orichalcum Anvil To craft a Mythril Anvil, collect 10 Mythril Bars and craft the anvil using an Iron Anvil or a Lead Anvil. For the Orichalcum Anvil, you'll need 12 Orichalcum Bars. Mythril Bars and Orichalcum Bars are crafted by using Mythril and Orichalcum Ores in a Furnace.How do you craft an anvil in Terraria?
This means you'll need either 15 Iron Ore or Lead Ore, depending on what your world has generated for you. Smelt them in a Furnace, which you can make from stone, wood, and torches. Finally, bring five Iron or Lead bars to the Work Bench to make yourself an Anvil. Worlds will either spawn with Iron or Lead.Terraria How To Get Mythril Anvil (2022) | Terraria How To Get Orichalcum Anvil | Terraria 1.4.3.6
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