Shade
Monster Junkie
But it's not like regular death throes, since it can choose to do it.
I'll need to hunt for it, but I'm almost certain I've seen self-inflictable death throes abilities used before.
Would you be OK using the second text with "Explosive Death" or "Explosive Death Throes" for a name?
If I can't find the above, I'll begrudgingly go with the latter.