diff --git a/PKHeX/Resources/text/other/flags_sm.txt b/PKHeX/Resources/text/other/flags_sm.txt
index f714bdb52..2bdfdba5c 100644
--- a/PKHeX/Resources/text/other/flags_sm.txt
+++ b/PKHeX/Resources/text/other/flags_sm.txt
@@ -1 +1,2 @@
-0005	Test1
\ No newline at end of file
+3100	Magearna Event Active
+3487	Received Magearna Gift
\ No newline at end of file
diff --git a/PKHeX/Saves/SAV7.cs b/PKHeX/Saves/SAV7.cs
index c5a5a0636..3efc662bd 100644
--- a/PKHeX/Saves/SAV7.cs
+++ b/PKHeX/Saves/SAV7.cs
@@ -45,7 +45,7 @@ public SAV7(byte[] data = null)
         public override int Generation => 7;
         protected override int GiftCountMax => 48;
         protected override int GiftFlagMax => 0x100 * 8;
-        protected override int EventFlagMax => -1;
+        protected override int EventFlagMax => 3968;
         protected override int EventConstMax => (EventFlag - EventConst) / 2;
         public override int OTLength => 12;
         public override int NickLength => 12;
@@ -57,6 +57,8 @@ public SAV7(byte[] data = null)
         public override int MaxBallID => 0x1A; // 26
         public override int MaxGameID => 31; // MN
 
+        public int QRSaveData;
+
         // Feature Overrides
         public override bool HasGeolocation => true;
 
@@ -166,7 +168,7 @@ private void getSAVOffsets()
                 /* 02 */            //  = 0x01000;  // [014]    RandomGroup
                 /* 03 */ TrainerCard    = 0x01200;  // [0C0]    MyStatus
                 /* 04 */ Party          = 0x01400;  // [61C]    PokePartySave
-                /* 05 */ EventFlag      = 0x01C00;  // [E00]    EventWork
+                /* 05 */ EventConst     = 0x01C00;  // [E00]    EventWork
                 /* 06 */ PokeDex        = 0x02A00;  // [F78]    ZukanData
                 /* 07 */ GTS            = 0x03A00;  // [228]    GtsData
                 /* 08 */ Fused          = 0x03E00;  // [104]    UnionPokemon 
@@ -196,9 +198,11 @@ private void getSAVOffsets()
                 /* 32 */            //  = 0x6B200;  // [1FC]    BattleInstSave
                 /* 33 */ Daycare        = 0x6B400;  // [200]    Sodateya
                 /* 34 */            //  = 0x6B600;  // [120]    WeatherSave
-                /* 35 */            //  = 0x6B800;  // [1C8]    QRReaderSaveData
+                /* 35 */ QRSaveData     = 0x6B800;  // [1C8]    QRReaderSaveData
                 /* 36 */            //  = 0x6BA00;  // [200]    TurtleSalmonSave
 
+                EventFlag = EventConst + 0x7D0;
+
                 OFS_PouchHeldItem =     Item + 0; // 430 (Case 0)
                 OFS_PouchKeyItem =      Item + 0x6B8; // 184 (Case 4)
                 OFS_PouchTMHM =         Item + 0x998; // 108 (Case 2)
diff --git a/PKHeX/Subforms/Save Editors/SAV_EventFlags.cs b/PKHeX/Subforms/Save Editors/SAV_EventFlags.cs
index 227117000..7983acdc6 100644
--- a/PKHeX/Subforms/Save Editors/SAV_EventFlags.cs	
+++ b/PKHeX/Subforms/Save Editors/SAV_EventFlags.cs	
@@ -53,6 +53,8 @@ public SAV_EventFlags()
         private int constEntry = -1;
         private string gamePrefix = "unk";
 
+        private const ulong MagearnaConst = 0xCBE05F18356504AC;
+
         private void B_Cancel_Click(object sender, EventArgs e)
         {
             Close();
@@ -64,6 +66,8 @@ private void B_Save_Click(object sender, EventArgs e)
                 flags[getControlNum(flag)] = flag.Checked;
             SAV.EventFlags = flags;
 
+            HandleSpecialFlags();
+
             // Copy back Constants
             changeConstantIndex(null, null); // Trigger Saving
             SAV.EventConsts = Constants;
@@ -71,6 +75,15 @@ private void B_Save_Click(object sender, EventArgs e)
             Close();
         }
 
+        private void HandleSpecialFlags()
+        {
+            if (SAV.SM) // Ensure magearna event flag has magic constant
+            {
+                BitConverter.GetBytes((ulong)(flags[3100] ? MagearnaConst : 0)).CopyTo(SAV.Data, ((SAV7)SAV).QRSaveData + 0x168);
+            }
+
+        }
+
         private string[] getStringList(string type)
         {
             switch (SAV.Version)