Getting Tissue Samples in Terraria is essential if you want to craft top-tier pre-hardmode Crimson gear. Whether you're upgrading your pickaxe or building armor that can withstand early boss fights, you'll need a steady supply of this crafting material.
Unlike items found in standard underground chests, Tissue Samples require you to actively hunt specific bosses and enemies within the Crimson biome. You can't farm them in a Corruption world without artificial setup, making preparation vital before you head underground.
Where to Find Tissue Samples in Terraria
Tissue Samples are exclusively tied to the Crimson biome. If your world generated with the Corruption instead, you won't naturally find Crimson enemies or materials unless you artificially create a Crimson biome using seeds bought from the Dryad in Hardmode.
You can acquire Tissue Samples through two main methods: defeating the Brain of Cthulhu boss or destroying Crimson Hearts within Crimson chasms. Each source yields reliable amounts of the material, allowing you to choose the farming method that fits your current gear level and world setup.
Fighting the Brain of Cthulhu
The most reliable, repeatable way to farm Tissue Samples is by taking down the Brain of Cthulhu. Each time you defeat this boss, it drops a substantial quantity of samples, along with Crimtane Ore.
To summon the Brain of Cthulhu, you have two options:
- Shatter Crimson Hearts: Use a hammer or explosives to smash three Crimson Hearts located deep within the underground chasms. The third broken heart automatically spawns the boss.
- Craft a Bloody Spine: Combine 15 Vertebrae (dropped by standard enemies in the Crimson) at a Demon or Crimson Altar. This creates a summon item you can use anywhere inside the Crimson biome at any time.
During the first phase of the fight, you must destroy the floating Creeper enemies that surround the boss. Each Creeper you defeat drops 1 to 3 Tissue Samples. This means you don't even need to beat the entire boss to start collecting materials—though defeating the main brain yields a large bonus payout upon victory.
Smashing Crimson Hearts
If you're exploring the chasms early in the game before you're ready to fight bosses, smashing individual Crimson Hearts is a quick way to grab a few samples. Each heart you destroy drops 10 to 30 Tissue Samples along with a guaranteed Crimson weapon or accessory (such as the Undertaker or the Crimson Rod).
Keep in mind that world size determines how many Crimson Hearts exist. Once you shatter every heart in your world, you must rely entirely on crafting Bloody Spines to re-summon the Brain of Cthulhu for future farming.
What to Craft With Tissue Samples
Once you've gathered your materials at an Iron or Lead Anvil, you can combine them with Crimtane Bars to forge powerful gear. Crimson equipment provides strong defensive bonuses and passive health regeneration benefits that make subsequent exploration much easier.
Key items you can craft include:
- Deathbringer Pickaxe: Requires 12 Tissue Samples and 35 Crimtane Bars. This tool is strong enough to mine Hellstone, unlocking molten gear.
- Fleshcatcher: Requires 6 Tissue Samples and 12 Crimtane Bars. A solid spear weapon for keeping groups of enemies at bay.
- Crimson Helmet, Scalemail, and Greaves: Requires a total of 45 Tissue Samples and 75 Crimtane Bars for the full set. Wearing all pieces grants a major bonus to movement speed and life regeneration.
Frequently Asked Questions
Can you get Tissue Samples in a Corruption world?
Not naturally. Corruption worlds generate with Shadow Scales and Demonite instead of Tissue Samples and Crimtane. To get Tissue Samples, you must buy Crimson Seeds from the Dryad in a graveyard biome during Hardmode, or bring Crimson items from another world.
How many Tissue Samples do you need for a full armor set and pickaxe?
You need 57 Tissue Samples total to craft the complete Crimson armor set and the Deathbringer Pickaxe. You can easily get this amount by defeating the Brain of Cthulhu two or three times.
Do Creepers respawn during the Brain of Cthulhu fight?
No. Creepers only spawn once at the start of the first phase. Once you defeat all of them, they won't return, transitioning the fight into its second phase where you must damage the exposed brain directly.
