Redstone Miner

The Redstone Miner is an NPC located in the. He grants players up to four Accessory Bag slots, in exchange for increasing amounts of Redstone.

Quest
Interacting with the Redstone Miner for the first time starts the The Redstone Maniac quest. Provided the player has reached 250 Redstone collection, the NPC asks them for 128 Redstone. The player will receive an additional Accessory Bag slot, upon giving the items to the Redstone Miner. This can be repeated three more times, with 256, 512 and 1024 Redstone respectively.

Trivia

 * This quest aims at introducing new players to Accessories and the Accessory Bag.
 * According to the official Hypixel Skyblock wiki, the Redstone Miner is the brother of the Lapis Miner.