Herobrine should have a diamond sword with sharpness 10 fire aspeckt 2 and unbreaking 100. You should also give it a name like "Shadow bringer" but in latin (use google translate). Notch should have the same sword but it should be a gold sword or axe and it should have a difrent name like "Light bringer" But in latin.
You could have an easter egg shop that sells "The Notched Pickaxe" from skyrim.
And as for the normal shops just sell Iron stuff.
