Something metal or bedrock related, maybe bedrock shards from which you can make bedrock. Maybe bedrock armor and toolset made from bedrock?

Bedrock combined with obsidiron ingot will create a super-strong alloy that the dimension-end armor/tool set will be made out of.

Added bedrock shards, but still need to add useable items like staves and guns. Probably going to add a gun, a pickaxe, and some kind of inventory item.

Added the Oblivion, Rifle of the Juggernaut and the Greatsword of the Bedrock Guardian

Still need to add one more drop

Added Shiny Staff of Golem Summoning