diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/GameConfig.kt b/src/main/kotlin/org/hexworks/cavesofzircon/GameConfig.kt
index 1545148..be43394 100644
--- a/src/main/kotlin/org/hexworks/cavesofzircon/GameConfig.kt
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/GameConfig.kt
@@ -24,6 +24,7 @@ object GameConfig {
 
     // entities
     const val FUNGI_PER_LEVEL = 15
+    const val BATS_PER_LEVEL = 10
     const val MAXIMUM_FUNGUS_SPREAD = 20
 
     fun buildAppConfig() = AppConfigs.newConfig()
diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/attributes/types/EntityTypes.kt b/src/main/kotlin/org/hexworks/cavesofzircon/attributes/types/EntityTypes.kt
index ed573cb..2c01dee 100644
--- a/src/main/kotlin/org/hexworks/cavesofzircon/attributes/types/EntityTypes.kt
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/attributes/types/EntityTypes.kt
@@ -11,6 +11,9 @@ object Wall : BaseEntityType(
 object Fungus : BaseEntityType(
         name = "fungus"), Combatant
 
+object Bat : BaseEntityType(
+        name = "bat"), Combatant
+
 object StairsDown : BaseEntityType(
         name = "stairs down")
 
diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/builders/EntityFactory.kt b/src/main/kotlin/org/hexworks/cavesofzircon/builders/EntityFactory.kt
index 3e3a519..83d773c 100644
--- a/src/main/kotlin/org/hexworks/cavesofzircon/builders/EntityFactory.kt
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/builders/EntityFactory.kt
@@ -11,6 +11,7 @@ import org.hexworks.cavesofzircon.attributes.FungusSpread
 import org.hexworks.cavesofzircon.attributes.Vision
 import org.hexworks.cavesofzircon.attributes.flags.BlockOccupier
 import org.hexworks.cavesofzircon.attributes.flags.VisionBlocker
+import org.hexworks.cavesofzircon.attributes.types.Bat
 import org.hexworks.cavesofzircon.attributes.types.Fungus
 import org.hexworks.cavesofzircon.attributes.types.Player
 import org.hexworks.cavesofzircon.attributes.types.StairsDown
@@ -28,6 +29,7 @@ import org.hexworks.cavesofzircon.systems.InputReceiver
 import org.hexworks.cavesofzircon.systems.Movable
 import org.hexworks.cavesofzircon.systems.StairClimber
 import org.hexworks.cavesofzircon.systems.StairDescender
+import org.hexworks.cavesofzircon.systems.Wanderer
 import org.hexworks.cavesofzircon.world.Game
 import org.hexworks.cavesofzircon.world.GameContext
 
@@ -61,6 +63,7 @@ object EntityFactory {
         attributes(
                 Vision(9),
                 EntityPosition(),
+                BlockOccupier,
                 CombatStats.create(
                         maxHp = 100,
                         attackValue = 10,
@@ -68,7 +71,7 @@ object EntityFactory {
                 EntityTile(GameTileRepository.PLAYER),
                 EntityActions(Dig::class, Attack::class))
         behaviors(InputReceiver)
-        facets(Movable, CameraMover, StairClimber, StairDescender)
+        facets(Movable, CameraMover, StairClimber, StairDescender, Attackable, Destructible)
     }
 
     fun newFungus(fungusSpread: FungusSpread = FungusSpread()) = newGameEntityOfType(Fungus) {
@@ -83,5 +86,18 @@ object EntityFactory {
         facets(Attackable, Destructible)
         behaviors(FungusGrowth)
     }
+
+    fun newBat() = newGameEntityOfType(Bat) {
+        attributes(BlockOccupier,
+                EntityPosition(),
+                EntityTile(GameTileRepository.BAT),
+                CombatStats.create(
+                        maxHp = 5,
+                        attackValue = 2,
+                        defenseValue = 1),
+                EntityActions(Attack::class))
+        facets(Movable, Attackable, Destructible)
+        behaviors(Wanderer)
+    }
 }
 
diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameColors.kt b/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameColors.kt
index a6baf2f..9ebe6d3 100644
--- a/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameColors.kt
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameColors.kt
@@ -10,6 +10,7 @@ object GameColors {
     val FLOOR_BACKGROUND = TileColors.fromString("#1e2320")
 
     val FUNGUS_COLOR = TileColors.fromString("#85DD1B")
+    val BAT_COLOR = TileColors.fromString("#2348b2")
 
     val ACCENT_COLOR = TileColors.fromString("#FFCD22")
 
diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameTileRepository.kt b/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameTileRepository.kt
index d570540..ef1fb9b 100644
--- a/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameTileRepository.kt
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/builders/GameTileRepository.kt
@@ -44,6 +44,12 @@ object GameTileRepository {
             .withForegroundColor(GameColors.FUNGUS_COLOR)
             .buildCharacterTile()
 
+    val BAT = Tiles.newBuilder()
+            .withCharacter('b')
+            .withBackgroundColor(GameColors.FLOOR_BACKGROUND)
+            .withForegroundColor(GameColors.BAT_COLOR)
+            .buildCharacterTile()
+
     val UNREVEALED = Tiles.newBuilder()
             .withCharacter(' ')
             .withBackgroundColor(GameColors.UNREVEALED_COLOR)
diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/systems/Wanderer.kt b/src/main/kotlin/org/hexworks/cavesofzircon/systems/Wanderer.kt
new file mode 100644
index 0000000..fd886ca
--- /dev/null
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/systems/Wanderer.kt
@@ -0,0 +1,24 @@
+package org.hexworks.cavesofzircon.systems
+
+import org.hexworks.amethyst.api.base.BaseBehavior
+import org.hexworks.amethyst.api.entity.EntityType
+import org.hexworks.cavesofzircon.commands.MoveTo
+import org.hexworks.cavesofzircon.extensions.GameEntity
+import org.hexworks.cavesofzircon.extensions.position
+import org.hexworks.cavesofzircon.extensions.sameLevelNeighborsShuffled
+import org.hexworks.cavesofzircon.world.GameContext
+
+object Wanderer : BaseBehavior<GameContext>() {
+
+    override fun update(entity: GameEntity<EntityType>, context: GameContext): Boolean {
+        val pos = entity.position
+        if (pos.isUnknown().not()) {
+            entity.executeCommand(MoveTo(
+                    context = context,
+                    source = entity,
+                    position = pos.sameLevelNeighborsShuffled().first()))
+            return true
+        }
+        return false
+    }
+}
diff --git a/src/main/kotlin/org/hexworks/cavesofzircon/world/GameBuilder.kt b/src/main/kotlin/org/hexworks/cavesofzircon/world/GameBuilder.kt
index 4b34de3..8470c18 100644
--- a/src/main/kotlin/org/hexworks/cavesofzircon/world/GameBuilder.kt
+++ b/src/main/kotlin/org/hexworks/cavesofzircon/world/GameBuilder.kt
@@ -2,6 +2,7 @@ package org.hexworks.cavesofzircon.world
 
 import org.hexworks.amethyst.api.entity.EntityType
 import org.hexworks.cavesofzircon.GameConfig
+import org.hexworks.cavesofzircon.GameConfig.BATS_PER_LEVEL
 import org.hexworks.cavesofzircon.GameConfig.WORLD_SIZE
 import org.hexworks.cavesofzircon.attributes.types.Player
 import org.hexworks.cavesofzircon.builders.EntityFactory
@@ -28,6 +29,7 @@ class GameBuilder(val worldSize: Size3D = WORLD_SIZE) {
 
         val player = addPlayer()
         addFungi()
+        addBats()
 
         val game = Game.create(
                 player = player,
@@ -56,6 +58,14 @@ class GameBuilder(val worldSize: Size3D = WORLD_SIZE) {
         }
     }
 
+    private fun addBats() = also {
+        repeat(world.actualSize().zLength) { level ->
+            repeat(BATS_PER_LEVEL) {
+                EntityFactory.newBat().addToWorld(level)
+            }
+        }
+    }
+
     private fun <T : EntityType> GameEntity<T>.addToWorld(
             atLevel: Int,
             atArea: Size = world.actualSize().to2DSize()): GameEntity<T> {