"Mine - exploding (Goblin land mine)"
is the one and you have to incease the "Data - Invisibility Transition Time" to a very high number (I suggest using the Shift-key to incease it over the limits of the WE).
What you also could do is just remove the ability from the GLM, but then you have to trigger the Range->Death stuff.
PS: after that the Goblin Landmine is selectable. If you don't want that to happen, just add the "locus"ability to the Goblin Landmine.