diff --git a/.gitattributes b/.gitattributes
index c88e068ee77..e792ac68039 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2377,6 +2377,7 @@ res/cardsfolder/d/dark_offering.txt svneol=native#text/plain
 res/cardsfolder/d/dark_privilege.txt svneol=native#text/plain
 res/cardsfolder/d/dark_revenant.txt -text
 res/cardsfolder/d/dark_ritual.txt svneol=native#text/plain
+res/cardsfolder/d/dark_sphere.txt -text
 res/cardsfolder/d/dark_supplicant.txt -text svneol=unset#text/plain
 res/cardsfolder/d/dark_suspicions.txt -text svneol=unset#text/plain
 res/cardsfolder/d/dark_temper.txt svneol=native#text/plain
diff --git a/res/cardsfolder/d/dark_sphere.txt b/res/cardsfolder/d/dark_sphere.txt
new file mode 100644
index 00000000000..95a2389510c
--- /dev/null
+++ b/res/cardsfolder/d/dark_sphere.txt
@@ -0,0 +1,11 @@
+Name:Dark Sphere
+ManaCost:0
+Types:Artifact
+A:AB$ ChooseSource | Cost$ T Sac<1/CARDNAME> | Choices$ Card | RememberChosen$ True | AILogic$ NeedsPrevention | SubAbility$ DBEffect | SpellDescription$ The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.
+SVar:DBEffect:DB$ Effect | Triggers$ DamageDealt | StaticAbilities$ StaticPrevent | SVars$ ExileEffect | RememberObjects$ Remembered
+SVar:StaticPrevent:Mode$ PreventDamage | Source$ Card.IsRemembered | Target$ You | Amount$ HalfDown | EffectZone$ Command | Description$ The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.
+SVar:DamageDealt:Mode$ DamageDone | ValidSource$ Card.IsRemembered | ValidTarget$ You | Execute$ ExileEffect | Static$ True
+SVar:ExileEffect:DB$ ChangeZone | Defined$ Self | Origin$ Command | Destination$ Exile
+SVar:RemAIDeck:True
+SVar:Picture:http://www.wizards.com/global/images/magic/general/dark_sphere.jpg
+Oracle:{T}, Sacrifice Dark Sphere: The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.
diff --git a/src/main/java/forge/card/staticability/StaticAbilityPreventDamage.java b/src/main/java/forge/card/staticability/StaticAbilityPreventDamage.java
index 378cd607972..403bb132498 100644
--- a/src/main/java/forge/card/staticability/StaticAbilityPreventDamage.java
+++ b/src/main/java/forge/card/staticability/StaticAbilityPreventDamage.java
@@ -96,6 +96,8 @@ public class StaticAbilityPreventDamage {
             restDamage = restDamage - Integer.parseInt(params.get("Amount"));
         } else if (params.get("Amount").matches("HalfUp")) {
             restDamage = restDamage - (int) (Math.ceil(restDamage / 2.0));
+        } else if (params.get("Amount").matches("HalfDown")) {
+            restDamage = restDamage - (int) (Math.floor(restDamage / 2.0));
         } else {
             restDamage = restDamage - CardFactoryUtil.xCount(hostCard, hostCard.getSVar(params.get("Amount")));
         }