just the fragments, google the rms guide on summoning thanatos, it will show you where to get the fragments, you do not need to follow the whole procedure, just the last part where you put the fragments in. the stats, i told you, normal fas or ds build, look for the fas build that el made here in the strategy guides. try reading what the thanatos room npc says on the information option.
do all the research you can would be a lot better and then ask questions :)