diff --git a/Mage.Tests/src/test/java/org/mage/test/ai/ObNixilistheFallenTest.java b/Mage.Tests/src/test/java/org/mage/test/ai/ObNixilistheFallenTest.java
new file mode 100644
index 00000000000..fcc4ffbb214
--- /dev/null
+++ b/Mage.Tests/src/test/java/org/mage/test/ai/ObNixilistheFallenTest.java
@@ -0,0 +1,33 @@
+package org.mage.test.ai;
+
+import junit.framework.Assert;
+import mage.Constants;
+import mage.game.permanent.Permanent;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestBase;
+
+/**
+ * @author ayratn
+ */
+public class ObNixilistheFallenTest extends CardTestBase {
+
+    /**
+     * Reproduces bug when AI doesn't use good "may" ability.
+     */
+    @Test
+    public void testMayAbilityUsed() {
+        addCard(Constants.Zone.BATTLEFIELD, playerA, "Ob Nixilis, the Fallen");
+        addCard(Constants.Zone.HAND, playerA, "Swamp", 1);
+
+        playLand(playerA, "Swamp");
+        execute();
+
+        Permanent master = getPermanent("Ob Nixilis, the Fallen", playerA.getId());
+        Assert.assertNotNull(master);
+        Assert.assertEquals(6, master.getPower().getValue());
+        Assert.assertEquals(6, master.getToughness().getValue());
+
+        assertLife(playerA, 20);
+        assertLife(playerB, 11); // lose 3 life + attack with 6\6
+    }
+}