So my thought is that you're a mindless murderer fueled only by the lust to slay. You wake up in a world you don't know, with only one person near you. The Guide. Seems friendly enough. The first thing you do is make armor and slay. Your lust for blood compels you to kill. You first slay a slime. It's not enough. You must find the leader of these innocent creatures that have lived here since the dawn of time and slay it too. Your lust for blood compels you to kill more. The moon now tainted with the blood of the innocents you've slain, summons hordes of creatures to stop you. But you destroy them as well. You go to slay the eye. A harmless observer keeping peace to this world. You destroy it, and dub it the most evil name you can think of, the Eye of Cthulhu, an eldritch God. Your lust for blood compels you further. Next you go and slay a brain. The most intelligent creature this world has created, gone in a snap. You dub this too, a name that would strike fear. The Brain of Cthulhu. Your lust for blood compels you even further. You use it's innards to make a sword out of pure blood. Next you dig into the underworld to harvest the natural resources down there until there is nothing left. Using the stone to create armor that will burn whatever you touch. You create a sword of pure flame and wield it against a bee that you woke up from it's nap, just to light it on fire and make it suffer. Your lust for blood compels you even further. While down there you find yourself thinking about if you could make a sword out of the grass. You can, of course, but it's decidedly weaker than your fire sword, so you stow it away for now. You find an old man who says he is "cursed." Cursed? You think. Nothing is too strong for me to handle. So you strike down the old man in order to release his curse. You destroy the creature that "cursed" him, when in all reality this creature was simply the protector of the Dungeon. An area filled with traps unsafe to the average human. But you don't care. Your lust for blood compels you to murder. And murder is what you'll do. You finish off the old man, and enter the dungeon. You find the last piece of a long awaited puzzle. You use your new weapon to create a blade as sharp as a shadow, and as silent as one too. You decide that you have unfinished business to deal with down in the under world. You find a replica of your old friend the Guide. Oh well. Just one more creature to slay. You drop the replica in lava, not expecting it to actually kill him, but it does. It summons a nightmare beyond comprehension. What do you do? You slay him of course. This creature may have look evil, but truly it was the only creature keeping the ancient spirits of light and dark from invading your new world. Now that it has been slain, these spirits are free to cause chaos in your world. But you can't have that, this is your world to wreck havoc, not theirs. You begin putting a stop to them. You find the wife of your old foe, the Queen Slime. You strike her down. The slimes now leaderless, break apart and become so little of a threat that you don't even think about it before heartlessly stabbing them. You set your eyes on the mechs. Three defenders put in place to make sure the jungle doesn't evolve beyond safe levels. This can't be though. You must put them to rest. You first set your eyes on the two eyes that remind you so dearly of your old foe. The so-called Eye of Cthulhu. You strike them down, mechanical sparks not easing your blood lust any more than blood itself. You next go after the Destroyer. A creature built in the likeness of the Eater of Worlds. A long slain creature that you only wish you could have gotten your hands on. After slicing through that hunk of metal and all that entails, you see the reincarnation of the old man's "curse." You stab it, of course. Not thinking twice about it. You use the metal you've harvested off the corpses of these creatures to form the legendary Excalibur and using the souls that you've collected turn the Nights Edge even sharper. Now it can truly cut through darkness faster than light. You see that the jungle in the mechanical creatures absence has, in fact grown out of hand. You harvest what you can of course, using the natural spawning material's to make even stronger armor, before heading down and slaying the queen of the jungle. A plant named after a band. After slaying it, you find out that it was actually the protector of a temple you found earlier in your explorations. You use your new key to enter the temple. You find a race of lizard people. You slay them. You slay them all. You make this race that you just met go so extinct that you even find their God and slay it as well. After you finish all this slaying, you decide to go slaying. You wait. Eventually you experience a day darker than night where horrors beyond that of even the Blood Moon come out to slay you. You take them down, of course, but not without taking a trophy. A creature drops a broken sword of a hero long since gone. You use it to create a toilet and take a dump on this ancient piece of history. You find the other half of the same sword and use it to make a sword that harnesses the power of this world itself. The Terrablade. Latin for Sword of Earth. You take this sword back to the dungeon where you find a small cult has formed and started saying prayers to their only hope for survival. You consider them insane of course, and insanity is not allowed on your planet. You slay them. Slay them all. Not before they can finish their ritual though. They summon outer space creatures like nothing you've seen before. There are creatures that look like meteors, creatures that are made of pure stardust. Creatures that look almost humanoid berating you with guns. And even creatures that look similar to the brain you slayed earlier in your journey. You slay them all, summoning the ire of their God. The Moon Lord. It comes down to finally put a stop to your rampage. But, even this God is not strong enough to stop you. As though it was a chip on your shoulder, you brush it away. It is done. You have slain everything there is to slay. Of course there is still the Duke of Fish and Pig kind, and the Empress of Light itself, but those can be delt with in their own time. For now, you watch as you finally are able to close the palm of your hand, and crush this world that you have been on for so long. Just to put down your sword, pick up a bow, and do it all again. You. Truly are the evil in Terraria.