[Trigger] Pipebomb confusion

[Undead0dd]

Well, since I'm making a Left 4 Dead Survival map, I need to know how to make a pipebomb using the triggers.
I've tried using:

• Event
• Unit - A unit Starts the effect of an Ability
• Conditions
• (Ability Being Cast) equal to Pipebomb
• Actions
• Wait 10.00 seconds
• Unit - Create 1 Dummy for (Owner of(Casting Unit)) at (Event - Target Point of ability being cast) facing (Position of (Casting Unit))
• Unit - Add Pipe1(Kaboom) to (Last Created Unit)
• Unit - Order (Last Created Unit) to (Neutral - Kaboom!) at (Event - Target Point of Ability being cast)

I tried doing this, because I though the Monster Lure lures the monsters to the ward itself, and then after the 10 seconds the lure explodes, obliterating the units near it, and dealing explosive splash damage to the ones that are close.