diff --git a/cogs/mercy.py b/cogs/mercy.py
index 55d04b3..6f5abe1 100644
--- a/cogs/mercy.py
+++ b/cogs/mercy.py
@@ -2,6 +2,7 @@ import discord
 from discord.ext import commands
 from config import AUTHORIZED_CHANNEL_ID
 from utils.MercyManager_class import MercyManager
+from utils.helpers import calc_chance_and_guarantee
 
 VALID_SHARDS = ["ancient", "void", "sacred", "primal", "remnant"]
 
@@ -10,23 +11,6 @@ class Mercy(commands.Cog):
         self.bot = bot
         self.mercy_manager = MercyManager()
 
-    def calc_chance_and_guarantee(self, shard_type, pulls):
-        """Calcule la chance actuelle et le pull garanti"""
-        rules = {
-            "ancient": {"start": 200, "increment": 5, "base": 0.5},
-            "void": {"start": 200, "increment": 5, "base": 0.5},
-            "sacred": {"start": 12, "increment": 2, "base": 6},
-            "primal_legendary": {"start": 75, "increment": 1, "base": 1},
-            "primal_mythical": {"start": 200, "increment": 10, "base": 0.5},
-            "remnant": {"start": 24, "increment": 1, "base": 0},
-        }
-        rule = rules[shard_type]
-        chance = rule["base"] if pulls < rule["start"] else rule["base"] + (pulls - rule["start"]) * rule["increment"]
-        guaranteed_at = None
-        if chance >= 100:
-            guaranteed_at = rule["start"] + (100 - rule["base"]) / rule["increment"]
-        return chance, guaranteed_at
-
     @commands.command(name="mercy")
     async def mercy(self, ctx, action: str = None, arg1: str = None, arg2: str = None):
         if ctx.channel.id != AUTHORIZED_CHANNEL_ID:
diff --git a/utils/MercyManager_class.py b/utils/MercyManager_class.py
index 3525145..3d9939d 100644
--- a/utils/MercyManager_class.py
+++ b/utils/MercyManager_class.py
@@ -88,8 +88,8 @@ class MercyManager:
             return rule["base"]
         return rule["base"] + (pulls - rule["threshold"]) * rule["increment"]
 
-    def get_guaranteed_pull(self, shard_type):
-        """Retourne le pull où la loot est garanti à 100%"""
+    def pulls_until_guaranteed(self, shard_type, pulls):
+        """Retourne combien de pulls restent avant un loot garanti"""
         rules = {
             "ancient": {"start": 200, "increment": 5, "base": 0.5},
             "void": {"start": 200, "increment": 5, "base": 0.5},
@@ -101,4 +101,6 @@ class MercyManager:
         if shard_type not in rules:
             return None
         rule = rules[shard_type]
-        return int(rule["start"] + (100 - rule["base"]) / rule["increment"])
+        guaranteed_pull = int(rule["start"] + (100 - rule["base"]) / rule["increment"])
+        remaining = guaranteed_pull - pulls
+        return remaining if remaining > 0 else 0
diff --git a/utils/helpers.py b/utils/helpers.py
index 80a82d6..a73ff67 100644
--- a/utils/helpers.py
+++ b/utils/helpers.py
@@ -99,3 +99,22 @@ def get_difficulty_display_name(difficulty):
 def is_authorized_channel(ctx):
     return ctx.channel.id == AUTHORIZED_CHANNEL_ID
 
+MERCY_RULES = {
+    "ancient": {"start": 200, "increment": 5, "base": 0.5},
+    "void": {"start": 200, "increment": 5, "base": 0.5},
+    "sacred": {"start": 12, "increment": 2, "base": 6},
+    "primal_legendary": {"start": 75, "increment": 1, "base": 1},
+    "primal_mythical": {"start": 200, "increment": 10, "base": 0.5},
+    "remnant": {"start": 24, "increment": 1, "base": 0},
+}
+
+def calc_chance_and_guarantee(shard_type, pulls):
+    """Retourne chance, pull garanti et pulls restants"""
+    if shard_type not in MERCY_RULES:
+        return 0, None, None
+    rule = MERCY_RULES[shard_type]
+    chance = rule["base"] if pulls < rule["start"] else rule["base"] + (pulls - rule["start"]) * rule["increment"]
+    guaranteed_at = int(rule["start"] + (100 - rule["base"]) / rule["increment"])
+    remaining = max(0, guaranteed_at - pulls)
+    return chance, guaranteed_at, remaining
+