Sons of Sins Mod Guide: Progression from Flesh to Soul Steel

Early Tier: Flesh and Organs

Start by collecting flesh and organ drops and turning them into Buckets of Blood. Craft the base blocks: Block of Flesh, Block of Hearts, Block of Muscles, and Block of Ribs. These are your foundation. From them you build the first tools: Osseous Axe, Osseous Hoe, Osseous Pickaxe, Osseous Shovel, and Osseous Sword. Also craft the Urn and the Flesh of Demise, which are used in later recipes.

Mid Tier: Mob-Specific Materials

The tier introduces mob-specific blocks and items: Blazing Heart, Creeper Ribs, Enderman Muscle, Ice Heart, Ravager Muscle, Slime Rear, Spider Heart, Strider Muscle, Golem Cuirass, and Flesh Carcass. These come from specific mobs and are combined into their block forms (Block of Blazing Hearts, Block of Creeper Ribs, Block of Cuirass, Block of Enderman Muscles, Block of Ice Hearts, Block of Ravager Muscles, Block of Slime Rear, Block of Spider Hearts, Block of Strider Muscles).

Late Tier: Sinful and Ether Gear

Upgrade Osseous tools into Sinful Axe, Sinful Hoe, Sinful Pickaxe, Sinful Shovel, and Sinful Sword. Then push into the tier: Ether Lantern, Ether Sword, Iron and Ether, Soul Steel, Soul Steel Block, Soul Steel Chain, Soul Steel Door, Soul Steel Slab, Soul Steel Stairs, Soul Steel Tiles, Soul Steel Trapdoor, Remnant Boots, Remnant Chestplate, Remnant Helmet, Remnant Leggings, Shape-Shifting Tool, and Sickle Of Struggle. Soul Steel is the backbone of the endgame — build its block, chain, door, slab, stairs, tiles, and trapdoor variants for base construction.