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/packet/PacketCastContinuousSpell.java

@@ -1,16 +1,19 @@
 package electroblob.wizardry.packet;
 
 import electroblob.wizardry.Wizardry;
+import electroblob.wizardry.data.WizardData;
 import electroblob.wizardry.packet.PacketCastContinuousSpell.Message;
+import electroblob.wizardry.spell.Spell;
 import electroblob.wizardry.util.SpellModifiers;
 import io.netty.buffer.ByteBuf;
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
 import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
 import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
 
 /**
  * <b>[Server -> Client]</b> This packet is sent when the /cast command is used with a continuous spell, in order to
- * sync the relevant variables in {@link electroblob.wizardry.WizardData WizardData}.
+ * sync the relevant variables in {@link WizardData WizardData}.
  */
 public class PacketCastContinuousSpell implements IMessageHandler<Message, IMessage> {
 
@@ -21,12 +24,7 @@ public class PacketCastContinuousSpell implements IMessageHandler<Message, IMess
 		if(ctx.side.isClient()){
 			// Using a fully qualified name is a good course of action here; we don't really want to clutter the proxy
 			// methods any more than necessary.
-			net.minecraft.client.Minecraft.getMinecraft().addScheduledTask(new Runnable(){
-				@Override
-				public void run(){
-					Wizardry.proxy.handleCastContinuousSpellPacket(message);
-				}
-			});
+			net.minecraft.client.Minecraft.getMinecraft().addScheduledTask(() -> Wizardry.proxy.handleCastContinuousSpellPacket(message));
 		}
 
 		return null;
@@ -34,24 +32,23 @@ public class PacketCastContinuousSpell implements IMessageHandler<Message, IMess
 
 	public static class Message implements IMessage {
 
-		// Note that range and blast multipliers are the only two that affect particle spawning, so they are the
-		// only two that need to be sent.
-
 		/** EntityID of the caster */
 		public int casterID;
 		/** ID of the spell being cast */
 		public int spellID;
 		/** SpellModifiers for the spell */
 		public SpellModifiers modifiers;
+		/** Number of ticks to cast the spell for, or -1 for non-continuous spells */
+		public int duration;
 
 		// This constructor is required otherwise you'll get errors (used somewhere in fml through reflection)
-		public Message(){
-		}
+		public Message(){}
 
-		public Message(int casterID, int spellID, SpellModifiers modifiers){
-			this.casterID = casterID;
-			this.spellID = spellID;
+		public Message(EntityPlayer caster, Spell spell, SpellModifiers modifiers, int duration){
+			this.casterID = caster.getEntityId();
+			this.spellID = spell.networkID();
 			this.modifiers = modifiers;
+			this.duration = duration;
 		}
 
 		@Override
@@ -61,6 +58,7 @@ public class PacketCastContinuousSpell implements IMessageHandler<Message, IMess
 			this.spellID = buf.readInt();
 			this.modifiers = new SpellModifiers();
 			modifiers.read(buf);
+			this.duration = buf.readInt();
 		}
 
 		@Override
@@ -68,6 +66,7 @@ public class PacketCastContinuousSpell implements IMessageHandler<Message, IMess
 			buf.writeInt(casterID);
 			buf.writeInt(spellID);
 			this.modifiers.write(buf);
+			buf.writeInt(duration);
 		}
 	}
 }