a lot of work on the Ritual of the Brewer

src/main/java/de/ellpeck/naturesaura/blocks/BlockPotionGenerator.java

@@ -0,0 +1,10 @@
+package de.ellpeck.naturesaura.blocks;
+
+import de.ellpeck.naturesaura.blocks.tiles.TileEntityPotionGenerator;
+import net.minecraft.block.material.Material;
+
+public class BlockPotionGenerator extends BlockContainerImpl {
+    public BlockPotionGenerator() {
+        super(Material.ROCK, "potion_generator", TileEntityPotionGenerator.class, "potion_generator");
+    }
+}

src/main/java/de/ellpeck/naturesaura/blocks/ModBlocks.java

@@ -18,4 +18,5 @@ public final class ModBlocks {
     public static final Block WOOD_STAND = new BlockWoodStand();
     public static final Block INFUSED_STONE = new BlockImpl("infused_stone", Material.ROCK).setSoundType(SoundType.STONE).setHardness(1.75F);
     public static final Block FURNACE_HEATER = new BlockFurnaceHeater();
+    public static final Block POTION_GENERATOR = new BlockPotionGenerator();
 }

src/main/java/de/ellpeck/naturesaura/blocks/Multiblocks.java

@@ -36,4 +36,16 @@ public final class Multiblocks {
                     '0', StateMatcher.fromPredicate(Blocks.SAPLING, state -> state.getBlock() instanceof BlockSapling || state.getBlock() instanceof BlockLog),
                     ' ', StateMatcher.ANY)
     ).setSymmetrical(true);
+    public static final Multiblock POTION_GENERATOR = MultiblockRegistry.registerMultiblock(
+            new ResourceLocation(NaturesAura.MOD_ID, "potion_generator"),
+            new Multiblock(new String[][]{
+                    {"R     R", "       ", "       ", "       ", "       ", "       ", "R     R"},
+                    {"N     N", "       ", "       ", "       ", "       ", "       ", "N     N"},
+                    {"N     N", "       ", "       ", "   0   ", "       ", "       ", "N     N"},
+                    {" N   N ", "NNN NNN", " NRRRN ", "  R R  ", " NRRRN ", "NNN NNN", " N   N "}},
+                    'N', Blocks.NETHER_BRICK,
+                    'R', Blocks.RED_NETHER_BRICK,
+                    '0', ModBlocks.POTION_GENERATOR,
+                    ' ', StateMatcher.ANY)
+    ).setSymmetrical(true);
 }

src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityPotionGenerator.java

@@ -0,0 +1,63 @@
+package de.ellpeck.naturesaura.blocks.tiles;
+
+import de.ellpeck.naturesaura.aura.chunk.AuraChunk;
+import de.ellpeck.naturesaura.blocks.Multiblocks;
+import net.minecraft.entity.EntityAreaEffectCloud;
+import net.minecraft.potion.Potion;
+import net.minecraft.potion.PotionEffect;
+import net.minecraft.potion.PotionType;
+import net.minecraft.util.EnumFacing;
+import net.minecraft.util.ITickable;
+import net.minecraft.util.math.AxisAlignedBB;
+import net.minecraft.util.math.BlockPos;
+import net.minecraftforge.fml.relauncher.ReflectionHelper;
+
+import java.util.List;
+
+public class TileEntityPotionGenerator extends TileEntityImpl implements ITickable {
+
+    @Override
+    public void update() {
+        if (!this.world.isRemote && this.world.getTotalWorldTime() % 10 == 0) {
+            if (Multiblocks.POTION_GENERATOR.validate(this.world, this.pos)) {
+                boolean addedOne = false;
+
+                List<EntityAreaEffectCloud> clouds = this.world.getEntitiesWithinAABB(EntityAreaEffectCloud.class, new AxisAlignedBB(this.pos).grow(3));
+                for (EntityAreaEffectCloud cloud : clouds) {
+                    if (cloud.isDead)
+                        continue;
+
+                    PotionType type = ReflectionHelper.getPrivateValue(EntityAreaEffectCloud.class, cloud, "field_184502_e", "potion");
+                    if (type == null)
+                        continue;
+
+                    for (PotionEffect effect : type.getEffects()) {
+                        Potion potion = effect.getPotion();
+                        if (potion.isBadEffect() || potion.isInstant()) {
+                            continue;
+                        }
+
+                        if (!addedOne) {
+                            int toAdd = (effect.getAmplifier() * 5 + 1) * (effect.getDuration() / 80);
+                            for (EnumFacing dir : EnumFacing.HORIZONTALS) {
+                                BlockPos offset = this.pos.offset(dir, 8);
+                                BlockPos spot = AuraChunk.getClosestSpot(this.world, offset, 10, offset);
+                                if (AuraChunk.getAuraInArea(this.world, spot, 10) < 15000) {
+                                    AuraChunk chunk = AuraChunk.getAuraChunk(this.world, spot);
+                                    chunk.storeAura(spot, toAdd / 4);
+                                }
+                            }
+                            addedOne = true;
+                        }
+
+                        float newRadius = cloud.getRadius() - 0.25F;
+                        if (newRadius < 0.5F)
+                            cloud.setDead();
+                        else
+                            cloud.setRadius(newRadius);
+                    }
+                }
+            }
+        }
+    }
+}

src/main/resources/assets/naturesaura/blockstates/potion_generator.json

@@ -0,0 +1,20 @@
+{
+    "forge_marker": 1,
+    "defaults": {
+        "model": "minecraft:cube",
+        "textures": {
+            "particle": "naturesaura:blocks/potion_generator",
+            "up": "naturesaura:blocks/potion_generator_top",
+            "down": "naturesaura:blocks/potion_generator_bottom",
+            "north": "#particle",
+            "east": "#particle",
+            "south": "#particle",
+            "west": "#particle"
+        },
+        "transform": "forge:default-block"
+    },
+    "variants": {
+        "normal": [{}],
+        "inventory": [{}]
+    }
+}

src/main/resources/assets/naturesaura/lang/en_US.lang

@@ -12,6 +12,7 @@ tile.naturesaura.wood_stand.name=Wooden Stand
 tile.naturesaura.ancient_planks.name=Ancient Planks
 tile.naturesaura.infused_stone.name=Infused Rock
 tile.naturesaura.furnace_heater.name=Extraneous Firestarter
+tile.naturesaura.potion_generator.name=Absorber of Lingering
 
 item.naturesaura.eye.name=Environmental Eye
 item.naturesaura.gold_fiber.name=Brilliant Fiber

src/main/resources/assets/naturesaura/patchouli_books/book/en_us/entries/creating/potion_generator.json

@@ -0,0 +1,17 @@
+{
+    "name": "Ritual of the Brewer",
+    "icon": "naturesaura:potion_generator",
+    "category": "creating",
+    "advancement": "naturesaura:infused_materials",
+    "priority": true,
+    "pages": [
+        {
+            "type": "text",
+            "text": "bla bla bla"
+        },
+        {
+            "type": "multiblock",
+            "multiblock_id": "naturesaura:potion_generator"
+        }
+    ]
+}