diff --git a/src/main/java/com/garbagemule/MobArena/things/RandomThingPicker.java b/src/main/java/com/garbagemule/MobArena/things/RandomThingPicker.java
new file mode 100644
index 0000000..0b94287
--- /dev/null
+++ b/src/main/java/com/garbagemule/MobArena/things/RandomThingPicker.java
@@ -0,0 +1,31 @@
+package com.garbagemule.MobArena.things;
+
+import java.util.List;
+import java.util.Random;
+import java.util.stream.Collectors;
+
+public class RandomThingPicker implements ThingPicker {
+
+    private final List<ThingPicker> pickers;
+    private final Random random;
+
+    public RandomThingPicker(List<ThingPicker> pickers, Random random) {
+        this.pickers = pickers;
+        this.random = random;
+    }
+
+    @Override
+    public Thing pick() {
+        int index = random.nextInt(pickers.size());
+        return pickers.get(index).pick();
+    }
+
+    @Override
+    public String toString() {
+        String list = pickers.stream()
+            .map(ThingPicker::toString)
+            .collect(Collectors.joining(" or "));
+        return "(" + list + ")";
+    }
+
+}
diff --git a/src/main/java/com/garbagemule/MobArena/things/SingleThingPicker.java b/src/main/java/com/garbagemule/MobArena/things/SingleThingPicker.java
new file mode 100644
index 0000000..6534a5b
--- /dev/null
+++ b/src/main/java/com/garbagemule/MobArena/things/SingleThingPicker.java
@@ -0,0 +1,21 @@
+package com.garbagemule.MobArena.things;
+
+public class SingleThingPicker implements ThingPicker {
+
+    private final Thing thing;
+
+    public SingleThingPicker(Thing thing) {
+        this.thing = thing;
+    }
+
+    @Override
+    public Thing pick() {
+        return thing;
+    }
+
+    @Override
+    public String toString() {
+        return thing.toString();
+    }
+
+}
diff --git a/src/main/java/com/garbagemule/MobArena/things/ThingGroupPicker.java b/src/main/java/com/garbagemule/MobArena/things/ThingGroupPicker.java
new file mode 100644
index 0000000..ad548a2
--- /dev/null
+++ b/src/main/java/com/garbagemule/MobArena/things/ThingGroupPicker.java
@@ -0,0 +1,31 @@
+package com.garbagemule.MobArena.things;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class ThingGroupPicker implements ThingPicker {
+
+    private final List<ThingPicker> pickers;
+
+    public ThingGroupPicker(List<ThingPicker> pickers) {
+        this.pickers = pickers;
+    }
+
+    @Override
+    public Thing pick() {
+        List<Thing> things = pickers.stream()
+            .map(ThingPicker::pick)
+            .collect(Collectors.toList());
+
+        return new ThingGroup(things);
+    }
+
+    @Override
+    public String toString() {
+        String list = pickers.stream()
+            .map(ThingPicker::toString)
+            .collect(Collectors.joining(" and "));
+        return "(" + list + ")";
+    }
+
+}
diff --git a/src/main/java/com/garbagemule/MobArena/things/ThingPicker.java b/src/main/java/com/garbagemule/MobArena/things/ThingPicker.java
new file mode 100644
index 0000000..a34a40e
--- /dev/null
+++ b/src/main/java/com/garbagemule/MobArena/things/ThingPicker.java
@@ -0,0 +1,22 @@
+package com.garbagemule.MobArena.things;
+
+/**
+ * Pickers encapsulate a type of highly specific Factory pattern that revolves
+ * around choosing from an arbitrary pool of Thing instances without directly
+ * giving them to or taking them from players.
+ * <p>
+ * The interface exposes a single method, {@link #pick()}. When invoked, the
+ * implementation is expected to resolve or create a {@link Thing} instance
+ * or null. The how and why is entirely up to the implementation, but callers
+ * must not depend on the return value being stable, even though it may be.
+ */
+public interface ThingPicker {
+
+    /**
+     * Pick a thing.
+     *
+     * @return a {@link Thing} instance, or null
+     */
+    Thing pick();
+
+}
diff --git a/src/test/java/com/garbagemule/MobArena/things/RandomThingPickerTest.java b/src/test/java/com/garbagemule/MobArena/things/RandomThingPickerTest.java
new file mode 100644
index 0000000..c1fd0b0
--- /dev/null
+++ b/src/test/java/com/garbagemule/MobArena/things/RandomThingPickerTest.java
@@ -0,0 +1,45 @@
+package com.garbagemule.MobArena.things;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+public class RandomThingPickerTest {
+
+    private RandomThingPicker subject;
+    private List<ThingPicker> pickers;
+    private Random random;
+
+    @Before
+    public void setup() {
+        pickers = new ArrayList<>();
+        random = mock(Random.class);
+        subject = new RandomThingPicker(pickers, random);
+    }
+
+    @Test
+    public void invokesOnlyChosenPicker() {
+        ThingPicker decoy = mock(ThingPicker.class);
+        ThingPicker chosen = mock(ThingPicker.class);
+        pickers.add(decoy);
+        pickers.add(decoy);
+        pickers.add(chosen);
+        pickers.add(decoy);
+        when(random.nextInt(pickers.size())).thenReturn(2);
+
+        subject.pick();
+
+        verify(decoy, never()).pick();
+        verify(chosen, times(1)).pick();
+    }
+
+}
diff --git a/src/test/java/com/garbagemule/MobArena/things/ThingGroupPickerTest.java b/src/test/java/com/garbagemule/MobArena/things/ThingGroupPickerTest.java
new file mode 100644
index 0000000..ae1affb
--- /dev/null
+++ b/src/test/java/com/garbagemule/MobArena/things/ThingGroupPickerTest.java
@@ -0,0 +1,40 @@
+package com.garbagemule.MobArena.things;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+public class ThingGroupPickerTest {
+
+    private ThingGroupPicker subject;
+    private List<ThingPicker> pickers;
+
+    @Before
+    public void setup() {
+        pickers = new ArrayList<>();
+        subject = new ThingGroupPicker(pickers);
+    }
+
+    @Test
+    public void invokesAllPickers() {
+        ThingPicker first = mock(ThingPicker.class);
+        ThingPicker second = mock(ThingPicker.class);
+        ThingPicker third = mock(ThingPicker.class);
+        pickers.add(first);
+        pickers.add(second);
+        pickers.add(third);
+
+        subject.pick();
+
+        verify(first, times(1)).pick();
+        verify(second, times(1)).pick();
+        verify(third, times(1)).pick();
+    }
+
+}