Shoot the ghosts with my special Excorcism Sniper Rifle.
[15]BLAM! one down, 4 dozen to go. Oh, did you want more than one bullet?
"Well, I broke my leg. Any chance you could pick me up? And have an extra wheelchair? Science is important, but I'm in a lot of pain..."
12"Sure, I'll send help to you right away. Why didn't you say so the first time?" You hear sirens in the distance, not a minute later a medic comes to your door which you forgot to close, picks you up, applies first aid and starts driving you to the lab.
Sour my soul and make it completely unedible.
[7]"
Bleh, anise. Oh well, it's an acquired taste." They slow down, but keep eating your soul.
Who needs gun then one is, essentially, a cyborg?
[9]You don't have any weapons, implanted or otherwise. However...
LINE PIECE, TARGET: ROOF OF BUILDING WHERE SARRAK IS
[13]The roof collapses right on top of Evil Sarrak, crushing him.
The diversion worked!
UNLEASH OPERATION PIE STORM!
[1]You start humming "The flight of the Valkyries". Hm, in retrospect, maybe you should have told someone else about your plan, such as the helicopter pilots? No helicopter fleet arrives despite your valiant humming. The demon grabs you and lifts you off the ground.
Respawn.
Beat up the nearest human with cake.
If demons are weak to pie, that means humans are weak to cake, right?!
[3]You can't test your theory as you have no cake.
Begin the process of becoming a lich.
To become a lich, you need some ichor of a demon, some ambrosia, a feather of a phoenix and the heart of a giant sandworm. Oh, and you need a suitable phylactery, AND the skills to perform the ritual, including the proper invocation in a forgotten language. Good luck being reasonable about getting those.
"What happens when there aren't any more tasty human souls to eat?"
"
Then we eat the tasty animal souls, of course! Now let me deal with this little bugger right here..."