User blog comment:SuperGirlyGamer8/Hi!/@comment-26139174-20150807173731

So you use a dark lance, which is found in the dungeon, which needs skeletron to be defeated in order to enter. At that point, you should already defeat the eye of cthulu. ALSO, you have to endure hell, and search that god-forsaken pit of lava for the dark lance. By then, you should be preparing to take down the Wall of Flesh.

The last prism is endgame, and is DROPPED by the moon lord. OBVIOUSLY it would be very easy to kill it with that set up