I have a few. My favorite set of horror lyrics is probably "Scorpio Curse" by Electric Wizard:
<3 <3 <3
There's also another one by Electric Wizard that is so over the top and ridiculous that I can't help but love it: "Satanic Rites of Drugula".
"Your dope laced blood shows me new highs / bloodlust / druglust / Count Drugula, arise!" So stupid but I love it.
Any horror lyrics you like?