diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70fd48f40..e32e5abea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,10 @@
 ## [master] (https://github.com/WagicProject/wagic/tree/master)
 
 ### 20/09/21
-- *Committed:* Fixed primitives, improved background images management, now it's possbile to add a different background for opponent deck choosing (menupanel2.jpg) and added a new sub-folder "background" for custom themes where it will be possbile to store up to six new background images for battlefield (from "backdrop1.jpg" to "backdrop6.jpg") that will be randomly choosen when match starts. ([Vitty85](https://github.com/Vitty85))
+- *Committed:* Fixed primitives, fixed STA set, fixed a bug in new background images management. ([Vitty85](https://github.com/Vitty85))
+
+### 20/09/21
+- *Committed:* Fixed primitives, improved background images management, now it's possbile to add a different background for opponent deck choosing (menupanel2.jpg) and added a new sub-folder "background" for custom themes where it will be possbile to store up to six new background images for battlefield (from "backdrop1.jpg" to "backdrop6.jpg") that will be randomly choosen when match starts. https://github.com/WagicProject/wagic/commit/832d033488dade9603c1be6b5c4039bde020fcd5 ([Vitty85](https://github.com/Vitty85))
 
 ### 19/09/21
 - *Committed:* Fixed a bug on sound tracks for PSP/PSVita devices, removed a test on vampired trigger due to a fake error on test suite. https://github.com/WagicProject/wagic/commit/e2a1705b3f5ec84d975e468af9d1e48b7be5c581 ([Vitty85](https://github.com/Vitty85))
diff --git a/projects/mtg/bin/Res/sets/STA/_cards.dat b/projects/mtg/bin/Res/sets/STA/_cards.dat
index eeb9c3ea4..8fc62b3e6 100644
--- a/projects/mtg/bin/Res/sets/STA/_cards.dat
+++ b/projects/mtg/bin/Res/sets/STA/_cards.dat
@@ -1,7 +1,7 @@
 [meta]
 author=Wagic Team
 name=Strixhaven Mystical Archive
-orderindex=EXP-J.STA
+orderindex=REP-J.STA
 year=2021-04-23
 total=63
 [/meta]
diff --git a/projects/mtg/bin/Res/sets/primitives/borderline.txt b/projects/mtg/bin/Res/sets/primitives/borderline.txt
index b7627d0b8..64d1b82d4 100644
--- a/projects/mtg/bin/Res/sets/primitives/borderline.txt
+++ b/projects/mtg/bin/Res/sets/primitives/borderline.txt
@@ -13159,7 +13159,9 @@ toughness=2
 [card]
 name=Contamination
 auto=upcost[{S(creature|mybattlefield)}] sacrifice
-auto=lord(land) transforms((,newability[loseabilities],newability[losesubtypesof(land)],newability[becomes(swamp)]))
+auto=lord(land) loseabilities
+auto=lord(land) losesubtypesof(land)
+auto=lord(land) transforms((Swamp))
 text=At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature. -- If a land is tapped for mana, it produces {B} instead of any other type and amount.
 mana={2}{B}
 type=Enchantment
diff --git a/projects/mtg/src/GuiBackground.cpp b/projects/mtg/src/GuiBackground.cpp
index be1ce236a..b78d236f2 100644
--- a/projects/mtg/src/GuiBackground.cpp
+++ b/projects/mtg/src/GuiBackground.cpp
@@ -17,6 +17,7 @@ GuiBackground::GuiBackground(GameObserver* observer)
 
 GuiBackground::~GuiBackground()
 {
+    kBackdropFile = ""; //Reset the chosen backgorund.
 }
 
 void GuiBackground::Render()