damn imagine if you had an op power like that, the only problem is once you kill stuff you have no ability to revive it and whatnot so say i go into a house and say kill the lights that house and area in the world will forever be dark because no lights will ever be able to penetrate the dead zone. i wonder if you could kill the ability to age/ and damage yourself and maybe if you get bored of living for millions of years you can kill your boredom or eventually just kill yourself, either i guess its a matter of perspective.