Simply mess around with the Set Deaths action and Deaths condition.
For example, a timer.
Conditions: Whatever activates the timer.
Actions: Set Deaths for [Player]: Add 1 Deaths of [unused unit]
-Preserve Trigger
Set Player to whatever player is using the timer. Use Current Player if you want each players seperate, or you can set a sort of global timer.
So, you'll be adding deaths for the unused unit 1 at a time for however long.
If you don't have hyper triggers, it will fire once every 2 seconds (2000 ms), or with hyper triggers 12.2 times every 2 seconds. Just adjust accordingly to make sure it works.
Then, use the deaths conditions for whatever the "timer" example is set for.
Of course, this isn't limited to just timers. You can use it for counters, variables, whatever. The possibilities are limited to that of the user's mind.
