Terraria~ How to get into Skeletron's Dungeon without killing him

All you have to do is go into the Dungeon and wait till the boss music comes on make sure it's at night because if it wasn't he will do 10000 dmg on you well when your down there just run the skulls will come at you alot of them will but they only do 20 dmg to you so keep your potions rdy and get the chest and hearts if you wanna kill skeletron a easy way to do it is go in the dungeon and w8 for the music to start when it does run out of it as fast as you can only the head will come out so you dont have to fight the whole body it makes it alot easyer