Superdude was Springfield Elementary’s resident rodent (guinea pig, I believe). That’s how he died. I believe his carcass was shot into the air after oil was discovered in the school. That’s where Mr. Burns came in…
D’oh! Okay…I get it now. I thought it was directed at me, not the hamster.
Superman gets all his power from the sun, right? So have Dracula bite him and turn him into a vampire (which will work because it’s a form of magic). Superman now has to avoid the sun so he loses all his superpowers. When he’s reduced to being an ordinary vampire, drive a stake through his heart.
Little Nemo get the award for most creative way to wack Superman. Make him a vampire…hehe…
A recent issue of Superman had him infected by nanites with microscopic kryptonite slivers. Various superheroes had to shrink down with The Atom’s technology and cure Supes Jules Verne style.
A couple more bread and potatoes methods to kill a Kriptonian:
Psychic assault. It’s almost killed him several times before.
Electricity and sonic attacks seem to affect him better than brute force stuff.
I don’t know if his power levels are beyond this now, but the post Crisis Superman could be hurt really bad by nukes. If he’s still out of God status, I imagine an H-bomb would do the trick. I still like the nuclear bullet idea though.
In Kingdom Come it was revealed that the United States has developed contingency plans for attacking Superman or other superheroes if it decides it’s necessary. Special weapons that could kill anyone, even Superman, exist. Lex Luther would just have to gain access to these weapons.
Or you could do a crossover to the Marvel universe and steal the Ultimate Annihilator; the one weapon guaranteed to kill anyone.
He can’t breathe water, can he? Next time he’s drinking water, tell that Lois Lane joke that always cracks him up. The one with the lead bra. Then while he’s snorting water out his nose, tickle him so it goes down the wrong way.
Examine the rocket that brought him to Earth for traces of long dead Kryptonian Viral or Bacterial DNA.
Graft this DNA to an Earth organism, & infect him.
Of course, this may kill all Mankind, a’la The Andromeda Strain, but hey–ya can’t make an omlet without breakin’ some eggs, right?
The problem with the Vampire theory is that he still has access to the sun via reflection from the moon. He MUST have used his powers at night before. He’s not Ultraman, he doesn’t take off when the sun goes down.
What no one had recognized is that Superman is not immune to bullets. His costume is bullet proof. What we need is someone who can shoot him in the head.
If that doesn’t work, then get Roberta Flack to kill him softly with her song.
Forget the bullets, just throw guns at him. He can’t duck them all.