Diamond

By the way its Lleviathan its named after Leviathan the sea creature in the bible. They just added an L. At least that's how it is in the US version.

And fighting him both times, wasn't really hard for me. Because I super train all the time. I'm an RPG player, so level grinding is kinda my thing.

a tip if you start over, use metal slimes in the ragin' contagin' dun...