diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4db23fce..fb6a9b6d1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,11 @@
 
 ## [master] (https://github.com/WagicProject/wagic/tree/master)
 
+### 20/10/21
+- *Committed:* Added Q06 set, improved Android downloader, fixed bug for indestructible creatures that have to go different zone after death (e.g. if they have exiledeath ability), fixed a bug when indestructible creatures have toughness = 0 (e.g. "March of the Machines" with manacost = 0 artifacts). ([Vitty85](https://github.com/Vitty85))
+
 ### 18/10/21
-- *Committed:* Fixed "Krenko Commander" and "Plane of the Apes" decks for AI, added a commandline trace to check which soundtrack file is currently playing. ([Vitty85](https://github.com/Vitty85))
+- *Committed:* Fixed "Krenko Commander" and "Plane of the Apes" decks for AI, added a commandline trace to check which soundtrack file is currently playing. https://github.com/WagicProject/wagic/commit/fcb073ccd6cdf2c7c9422ab24f9de227202851c6 ([Vitty85](https://github.com/Vitty85))
 
 ### 17/10/21
 - *Committed:* Added a new deck named "Krenko Commander" for AI (credits to Bob). https://github.com/WagicProject/wagic/commit/5bf5e1dfbae0208a10d93c754aef20f5d06b2148 ([Vitty85](https://github.com/Vitty85))
diff --git a/projects/mtg/Android/src/net/wagic/utils/ImgDownloader.java b/projects/mtg/Android/src/net/wagic/utils/ImgDownloader.java
index e0a474b61..01f10c790 100644
--- a/projects/mtg/Android/src/net/wagic/utils/ImgDownloader.java
+++ b/projects/mtg/Android/src/net/wagic/utils/ImgDownloader.java
@@ -3282,7 +3282,8 @@ public class ImgDownloader {
                     || scryset.equals("AKR") || scryset.equals("ANB") || scryset.equals("PLIST") || scryset.equals("KLR") || scryset.equals("CC1")
                     || scryset.equals("ATH") || scryset.equals("HA4") || scryset.equals("TSR") || scryset.equals("HA5") || scryset.equals("H1R")
                     || scryset.equals("HTR18") || scryset.equals("HTR19") || scryset.equals("DKM") || scryset.equals("S00") || scryset.equals("XLN")
-                    || scryset.equals("SOI") || scryset.equals("UST") || scryset.equals("PLG21") || scryset.equals("J21") || scryset.equals("CC2")){
+                    || scryset.equals("SOI") || scryset.equals("UST") || scryset.equals("PLG21") || scryset.equals("J21") || scryset.equals("CC2")
+                    || scryset.equals("Q06")){
                 try {
                     doc = Jsoup.connect(imageurl + scryset.toLowerCase()).get();
                     Elements outlinks = doc.select("body a");
@@ -3448,7 +3449,8 @@ public class ImgDownloader {
                     && !scryset.equals("AKR") && !scryset.equals("ANB") && !scryset.equals("PLIST") && !scryset.equals("KLR") && !scryset.equals("CC1")
                     && !scryset.equals("ATH") && !scryset.equals("HA4") && !scryset.equals("TSR") && !scryset.equals("HA5") && !scryset.equals("H1R")
                     && !scryset.equals("HTR18") && !scryset.equals("HTR19") && !scryset.equals("DKM") && !scryset.equals("S00") && !scryset.equals("XLN")
-                    && !scryset.equals("SOI") && !scryset.equals("UST") && !scryset.equals("PLG21") && !scryset.equals("J21") && !scryset.equals("CC2")){
+                    && !scryset.equals("SOI") && !scryset.equals("UST") && !scryset.equals("PLG21") && !scryset.equals("J21") && !scryset.equals("CC2")
+                    && !scryset.equals("Q06")){
                 try {
                     doc = Jsoup.connect(imageurl + scryset.toLowerCase()).get();
                     Elements outlinks = doc.select("body a");
@@ -3565,7 +3567,8 @@ public class ImgDownloader {
                     && !scryset.equals("AKR") && !scryset.equals("ANB") && !scryset.equals("PLIST") && !scryset.equals("KLR") && !scryset.equals("CC1")
                     && !scryset.equals("ATH") && !scryset.equals("HA4") && !scryset.equals("TSR") && !scryset.equals("HA5") && !scryset.equals("H1R")
                     && !scryset.equals("HTR18") && !scryset.equals("HTR19") && !scryset.equals("DKM") && !scryset.equals("S00") && !scryset.equals("XLN")
-                    && !scryset.equals("SOI") && !scryset.equals("UST") && !scryset.equals("PLG21") && !scryset.equals("J21") && !scryset.equals("CC2")){
+                    && !scryset.equals("SOI") && !scryset.equals("UST") && !scryset.equals("PLG21") && !scryset.equals("J21") && !scryset.equals("CC2")
+                    && !scryset.equals("Q06")){
                 try {
                     doc = Jsoup.connect(imageurl + scryset.toLowerCase()).get();
                 } catch (Exception e) {
@@ -3734,7 +3737,7 @@ public class ImgDownloader {
                             || scryset.equals("ANB") || scryset.equals("PLIST") || scryset.equals("KLR") || scryset.equals("CC1") || scryset.equals("ATH")
                             || scryset.equals("HA4") || scryset.equals("TSR") || scryset.equals("HA5") || scryset.equals("H1R") || scryset.equals("HTR18")
                             || scryset.equals("HTR19") || scryset.equals("DKM") || scryset.equals("S00") || scryset.equals("XLN") || scryset.equals("SOI")
-                            || scryset.equals("UST") || scryset.equals("PLG21") || scryset.equals("J21") || scryset.equals("CC2")){
+                            || scryset.equals("UST") || scryset.equals("PLG21") || scryset.equals("J21") || scryset.equals("CC2") || scryset.equals("Q06")){
                         Elements metadata = doc.select("head meta");
                         if(metadata != null) {
                             for (int j = 0; j < metadata.size(); j++){
diff --git a/projects/mtg/bin/Res/sets/Q06/_cards.dat b/projects/mtg/bin/Res/sets/Q06/_cards.dat
new file mode 100644
index 000000000..9c58685f3
--- /dev/null
+++ b/projects/mtg/bin/Res/sets/Q06/_cards.dat
@@ -0,0 +1,57 @@
+[meta]
+author=Wagic Team
+name=Pioneer Challenge Decks 2021
+orderindex=PRO-ZF.Q06
+year=2021-10-15
+total=10
+[/meta]
+[card]
+primitive=Approach of the Second Sun
+id=296830
+rarity=R
+[/card]
+[card]
+primitive=Ethereal Armor
+id=296831
+rarity=C
+[/card]
+[card]
+primitive=Isolate
+id=296832
+rarity=R
+[/card]
+[card]
+primitive=Silkwrap
+id=296833
+rarity=U
+[/card]
+[card]
+primitive=Hidden Strings
+id=296834
+rarity=C
+[/card]
+[card]
+primitive=Chandra, Torch of Defiance
+id=296835
+rarity=M
+[/card]
+[card]
+primitive=Searing Blood
+id=296836
+rarity=U
+[/card]
+[card]
+primitive=Wild Slash
+id=296837
+rarity=U
+[/card]
+[card]
+primitive=Lurrus of the Dream-Den
+id=296838
+rarity=R
+[/card]
+[card]
+primitive=Spell Queller
+id=296839
+rarity=R
+[/card]
diff --git a/projects/mtg/include/AllAbilities.h b/projects/mtg/include/AllAbilities.h
index bc9f4e3a9..72fe8ec36 100644
--- a/projects/mtg/include/AllAbilities.h
+++ b/projects/mtg/include/AllAbilities.h
@@ -2411,9 +2411,8 @@ public:
                 _target->addptbonus(wppt->power.getValue(),wppt->toughness.getValue());
         }
         if(_target->has(Constants::INDESTRUCTIBLE) && wppt->toughness.getValue() < 0 && _target->toughness <= 0)
-        {
-            _target->controller()->game->putInGraveyard(_target);
-        }
+            _target->toGrave(true); // The indestructible creatures can have different destination zone after death.
+
         return MTGAbility::addToGame();
     }
     int destroy()
diff --git a/projects/mtg/src/AllAbilities.cpp b/projects/mtg/src/AllAbilities.cpp
index 69d93acf3..daf7bdc3d 100644
--- a/projects/mtg/src/AllAbilities.cpp
+++ b/projects/mtg/src/AllAbilities.cpp
@@ -2540,7 +2540,7 @@ AACounter::AACounter(GameObserver* observer, int id, MTGCardInstance * source, M
 
             //specail cases, indestructible creatures which recieve enough counters to kill it are destroyed as a state based effect
             if(_target->toughness <= 0 && _target->has(Constants::INDESTRUCTIBLE) && toughness < 0)
-                _target->controller()->game->putInGraveyard(_target);
+                _target->toGrave(true); // The indestructible cards can have different destination zone after death.
             return nb;
         }
         return 0;
diff --git a/projects/mtg/src/Damage.cpp b/projects/mtg/src/Damage.cpp
index 1e5ce3788..31294d769 100644
--- a/projects/mtg/src/Damage.cpp
+++ b/projects/mtg/src/Damage.cpp
@@ -183,7 +183,7 @@ int Damage::resolve()
             _target->counters->addCounter(-1, -1);
         }
         if(_target->toughness <= 0 && _target->has(Constants::INDESTRUCTIBLE))
-            _target->controller()->game->putInGraveyard(_target);
+            _target->toGrave(true); // The indestructible creatures can have different destination zone after death.
     }
     else if (target->type_as_damageable == Damageable::DAMAGEABLE_PLAYER && (source->has(Constants::INFECT)||source->has(Constants::POISONDAMAGER)))
     {
diff --git a/projects/mtg/src/GameObserver.cpp b/projects/mtg/src/GameObserver.cpp
index 26e106ca2..6eb44f272 100644
--- a/projects/mtg/src/GameObserver.cpp
+++ b/projects/mtg/src/GameObserver.cpp
@@ -927,6 +927,8 @@ void GameObserver::gameStateBasedEffects()
                 {
                     if(card->life < 1 && !card->has(Constants::INDESTRUCTIBLE))
                         card->destroy();//manor gargoyle... recheck
+                    if(card->toughness <= 0 && card->has(Constants::INDESTRUCTIBLE))
+                        card->toGrave(true);// Fixed a bug when indestructible creatures have toughness = 0 (e.g. March of the Machines with manacost = 0 artifacts).
                 }
             }
 
diff --git a/projects/mtg/src/MTGCardInstance.cpp b/projects/mtg/src/MTGCardInstance.cpp
index a4725dd07..24cd02c0b 100644
--- a/projects/mtg/src/MTGCardInstance.cpp
+++ b/projects/mtg/src/MTGCardInstance.cpp
@@ -511,6 +511,9 @@ int MTGCardInstance::totem(bool noregen)
 }
 int MTGCardInstance::toGrave( bool forced )
 {
+    if(basicAbilities[(int)Constants::INDESTRUCTIBLE] && !forced)
+        return 0; // Fixed bug for indestructible creatures that have to go different zone after death.
+
     Player * p = controller();
     if (basicAbilities[(int)Constants::EXILEDEATH] || basicAbilities[(int)Constants::GAINEDEXILEDEATH] || (basicAbilities[(int)Constants::HASDISTURB] && alternateCostPaid[ManaCost::MANA_PAID_WITH_RETRACE] == 1))
     {
@@ -542,17 +545,9 @@ int MTGCardInstance::toGrave( bool forced )
             ret->counters->addCounter(1, 1, false);
         return 1;
     }
-    if (!basicAbilities[(int)Constants::INDESTRUCTIBLE])
-    {
-        p->game->putInZone(this, p->game->inPlay, owner->game->graveyard);
-        return 1;
-    }
-    if (forced)
-    {
-        p->game->putInZone(this, p->game->inPlay, owner->game->graveyard);
-        return 1;
-    }
-    return 0;
+    // Let's put the creature in the default zone after death (graveyard).
+    p->game->putInZone(this, p->game->inPlay, owner->game->graveyard);
+    return 1;
 }
 int MTGCardInstance::destroy()
 {