´1.
-Events-Unit dies
-Conditions-dying unit equal to "your unit"
-Actions-Pick every doodad in "the whole map region"
And do
Actions- kill picked doodad
2.
-Events-Same as before
-Conditions-Same as before
-Actions-Change the terrain in "the whole map region"(or another region/spot on your map) and change it to "blight"
"the whole map region", create a region for the whole map. P.S:"-Actions-Pick every doodad in "the whole map region" blabla...", something like that, cant check WE atm.