Zilean Q's one of Elise's spiderlings
And Elise goes back to human form. What happens?

And Elise goes back to human form. What happens?

I would assume the bomb would explode. Since if the target dies before the countdown it detonates.
Yes but Elise's spiderlings don't die, they go back(??). You can see that by checking on a spiderling's HP between swaps.They will have the same HP as when Elise turned into human form, only modified by natural health regeneration.