I Need to know how to get creeps to kills

I am trying to start a new map and I was needing to know how to get creeps to chase and kill you like in the custom game run kitty run! I have figured how to get them to chase you but when you touch them they don't kill you like the oringinal wolves do can anyone help me

You can give them Permament Immolation ability (of course set damage to something high if you want it to kill instantly)

But, if the units had perminant immolation, you could see the effects.
So either:
Remove the special effects, and give the wolves a around 50-100 AoE of the immolation.
Or create a new trigger, and add the event A unit comes in range, for every wolf-based unit, and the action is to Kill Triggering unit.

But only use that methode when you don't have many wolves, else make it the same but use comes in range of your hero and kill the hero then.
You can replace the Unit-Type with a Owned by Player, etc.,
you can also make an aura and check if the runner has the buff.