From e56b8545c7ddf6bce363c4751c50858a09638f67 Mon Sep 17 00:00:00 2001
From: tool4EvEr <tool4EvEr@192.168.0.59>
Date: Tue, 18 May 2021 23:36:56 +0200
Subject: [PATCH] Fix paying negative life

---
 forge-game/src/main/java/forge/game/cost/CostPayLife.java | 6 +++++-
 forge-game/src/main/java/forge/game/player/Player.java    | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/forge-game/src/main/java/forge/game/cost/CostPayLife.java b/forge-game/src/main/java/forge/game/cost/CostPayLife.java
index 117fba983c3..7953ec78f7e 100644
--- a/forge-game/src/main/java/forge/game/cost/CostPayLife.java
+++ b/forge-game/src/main/java/forge/game/cost/CostPayLife.java
@@ -76,9 +76,13 @@ public class CostPayLife extends CostPart {
         Integer amount = this.convertAmount();
         if (amount == null) { // try to calculate when it's defined.
             amount = AbilityUtils.calculateAmount(ability.getHostCard(), getAmount(), ability);
+            // CR 107.1b
+            if (getAmount().contains("/Half")) {
+                amount = Math.max(amount, 0);
+            }
         }
 
-        if ((amount != null) && !payer.canPayLife(amount)) {
+        if (amount != null && !payer.canPayLife(amount)) {
             return false;
         }
 
diff --git a/forge-game/src/main/java/forge/game/player/Player.java b/forge-game/src/main/java/forge/game/player/Player.java
index b6043d78bbf..454026f3c6c 100644
--- a/forge-game/src/main/java/forge/game/player/Player.java
+++ b/forge-game/src/main/java/forge/game/player/Player.java
@@ -589,7 +589,7 @@ public class Player extends GameEntity implements Comparable<Player> {
     }
 
     public final boolean canPayLife(final int lifePayment) {
-        if (life < lifePayment) {
+        if (lifePayment > 0 && life < lifePayment) {
             return false;
         }
         return (lifePayment <= 0) || !hasKeyword("Your life total can't change.");