diff --git a/.gitattributes b/.gitattributes
index f34f0acf250..4ad43759d54 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -12285,6 +12285,7 @@ forge-gui/res/cardsfolder/p/powder_keg.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/p/power_armor.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/p/power_artifact.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/p/power_conduit.txt -text
+forge-gui/res/cardsfolder/p/power_leak.txt -text
 forge-gui/res/cardsfolder/p/power_matrix.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/p/power_of_fire.txt svneol=native#text/plain
 forge-gui/res/cardsfolder/p/power_play.txt -text
diff --git a/forge-ai/src/main/java/forge/ai/PlayerControllerAi.java b/forge-ai/src/main/java/forge/ai/PlayerControllerAi.java
index fc154226cc2..4d16b3c8818 100644
--- a/forge-ai/src/main/java/forge/ai/PlayerControllerAi.java
+++ b/forge-ai/src/main/java/forge/ai/PlayerControllerAi.java
@@ -115,7 +115,22 @@ public class PlayerControllerAi extends PlayerController {
         if (ability.getApi() != null) {
             switch (ability.getApi()) {
                 case ChooseNumber:
-                    return ability.getActivatingPlayer().isOpponentOf(player) ? 0 : ComputerUtilMana.determineLeftoverMana(ability, player);
+                    Player payingPlayer = ability.getActivatingPlayer();
+                    String logic = ability.getParamOrDefault("AILogic", "");
+
+                    if (logic.startsWith("PowerLeakMaxMana.") && ability.getHostCard().isEnchantingCard()) {
+                        // For cards like Power Leak, the payer will be the owner of the enchanted card
+                        // TODO: is there any way to generalize this and avoid a special exclusion?
+                        payingPlayer = ability.getHostCard().getEnchantingCard().getController();
+                    }
+
+                    int number = ComputerUtilMana.determineLeftoverMana(ability, player);
+
+                    if (logic.startsWith("MaxMana.") || logic.startsWith("PowerLeakMaxMana.")) {
+                        number = Math.min(number, Integer.parseInt(logic.substring(logic.indexOf(".") + 1)));
+                    }
+
+                    return payingPlayer.isOpponentOf(player) ? 0 : number;
                 case BidLife:
                     return 0;
                 default:
diff --git a/forge-gui/res/cardsfolder/p/power_leak.txt b/forge-gui/res/cardsfolder/p/power_leak.txt
new file mode 100644
index 00000000000..18b782eaf87
--- /dev/null
+++ b/forge-gui/res/cardsfolder/p/power_leak.txt
@@ -0,0 +1,15 @@
+Name:Power Leak
+ManaCost:1 U
+Types:Enchantment Aura
+K:Enchant enchantment
+A:SP$ Attach | Cost$ 1 U | ValidTgts$ Enchantment | AILogic$ Curse
+T:Mode$ Phase | Phase$ Upkeep | ValidPlayer$ EnchantedController | Execute$ DBPay | TriggerZones$ Battlefield | TriggerDescription$ At the beginning of the upkeep of enchanted enchantment's controller, that player may pay any amount of mana. CARDNAME deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.
+S:Mode$ PreventDamage | Target$ EnchantedController | Source$ Card.Self | Amount$ PaidAmount | References$ PaidAmount | Secondary$ True
+SVar:DBPay:DB$ ChooseNumber | Defined$ EnchantedController | ChooseAnyNumber$ True | ListTitle$ Pay Any Mana | AILogic$ PowerLeakMaxMana.2 | SubAbility$ DBStore
+SVar:DBStore:DB$ StoreSVar | SVar$ PaidAmount | Type$ CountSVar | Expression$ X | UnlessCost$ X | UnlessPayer$ EnchantedController | UnlessSwitched$ True | References$ X,PaidAmount | SubAbility$ DBDmg
+SVar:DBDmg:DB$ DealDamage | Defined$ EnchantedController | NumDmg$ 2 | SubAbility$ DBReset | References$ PaidAmount | StackDescription$ None
+SVar:DBReset:DB$ StoreSVar | SVar$ PaidAmount | Type$ Number | Expression$ 0 | References$ PaidAmount
+SVar:X:Count$ChosenNumber
+SVar:PaidAmount:Number$0
+SVar:Picture:http://www.wizards.com/global/images/magic/general/power_leak.jpg
+Oracle:Enchant enchantment\nAt the beginning of the upkeep of enchanted enchantment's controller, that player may pay any amount of mana. Power Leak deals 2 damage to that player. Prevent X of that damage, where X is the amount of mana that player paid this way.