That's a tough one. I'd have to say Killer from the Deep or We Who Are About to Die, probably the latter. A song about Gladiator? Yes please. And that intro. And the whole song.
bathe in blood, burned alive, armoured assault its too hard to choose, FUCK SAKE EVE-EYE-UL STOP MAKING YOUR SONGS SO GOOD, YOU MAKE OUT LIVES TOO DIFFICULT. FUCK MAN.
I've kept switching at first it was Thrasher then We Who Are About To Die, I've finally settled on Bathe in Blood closely followed by Killer from the deep.
Though my favourite Evile song so far is All Hallows Eve.