Minecraft Dungeons:Redstone Core

Redstone cores are devices that can be found in the Fiery Forge. They consist of a block of redstone encased in a stone shell. They first appear in a mineshaft-like area where the player must activate all of them in order to proceed further. They also appear in the boss arena near the end of the level. When the player clicks on a core, it will open up and start making a loud noise while charging up, it will then fire a large heat blast in 4 directions that will deal severe damage and some knockback damage too if a player, mob, or pet is struck by it. By activating the cores, the player helps power up the redstone monstrosity for the final boss battle. They can also be used to harm the monstrosity, since they appear in the arena.