prevent NPE

forge-game/src/main/java/forge/game/trigger/Trigger.java

@@ -205,6 +205,7 @@ public abstract class Trigger extends TriggerReplacementBase {
                 }
             }
             if (saDesc.equals("")) { // in case we haven't found anything better
+                if (sa != null)
                     saDesc = sa.toString();
             }
             // string might have leading whitespace

forge-gui-desktop/src/main/java/forge/toolbox/FSkin.java

@@ -1660,6 +1660,7 @@ public class FSkin {
         w0 = tempCoords[2];
         h0 = tempCoords[3];
 
+        if (bim != null)
             SkinImage.setImage(s0, bim.getSubimage(x0, y0, w0, h0));
     }