I have been playing for a long time now I got taziona (the best sword in game) from what I know, and "the legendary hamadrax"The Legendary Hamadrax (secondthe second best drill in game) andas well as full helly stony armouryarmor (don't know what it's called) from.
From what I know you have to upgradeupgrade; and after beating eater of worldsEater of Worlds and the eyeThe Eye, you have to go to the old man out sideOld Man outside this temple (spawns randomly on map) (varysvaries in colour), at night and then he would either say you are to weak, or please help me. If he says you are to weak (something along those lines) then you have to upgrade your things, if. If he says please help me, then you have a chance of beating "skeletron"Skeletron the next boss.
Then continue, <ifif I remember correctly you have to go to hell (not joking I mean in the game, not to be rude. Andand find the voodoo doll! which is dropped by the voodoo demons, then Summon "the wall of flesh"> P.S that is from what I remember, haven't played in months. Sorry if I am wrongsummon Wall of Flesh. A
A good weapon is "light disk"Light Disk