That's one heck of a commit you've got there...

I may have got a bit behind with version control. A lot behind, in fact. Maybe I'll go back and split this sometime - then again, I probably won't. But hey, at least it's here!

src/main/java/electroblob/wizardry/client/renderer/RenderSigil.java

@@ -1,10 +1,8 @@
 package electroblob.wizardry.client.renderer;
 
-import org.lwjgl.opengl.GL11;
-
 import electroblob.wizardry.entity.construct.EntityHealAura;
 import electroblob.wizardry.entity.construct.EntityMagicConstruct;
-import electroblob.wizardry.util.WizardryUtilities;
+import electroblob.wizardry.util.AllyDesignationSystem;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.BufferBuilder;
 import net.minecraft.client.renderer.GlStateManager;
@@ -15,6 +13,7 @@ import net.minecraft.client.renderer.entity.RenderManager;
 import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.util.ResourceLocation;
+import org.lwjgl.opengl.GL11;
 
 public class RenderSigil extends Render<EntityMagicConstruct> {
 
@@ -34,8 +33,8 @@ public class RenderSigil extends Render<EntityMagicConstruct> {
 
 		// Makes the sigil invisible to enemies of the player that created it
 		if(this.invisibleToEnemies){
-
-			if(entity.getCaster() instanceof EntityPlayer && !WizardryUtilities
+			// Unfortunately we can't access the caster's allies if they're not online, it only works the other way round
+			if(entity.getCaster() instanceof EntityPlayer && !AllyDesignationSystem
 					.isPlayerAlly((EntityPlayer)entity.getCaster(), Minecraft.getMinecraft().player)){
 				return;
 			}