The alchemy skill is beneficial while playing Skyrim. Players can use alchemy to craft powerful potions with potent effects. They can also sell these potions for a decent profit. Some of these potions can momentarily increase the Dragonborn's many skills. The sneak skill is vital to fans looking to join the Dark Brotherhood or the Thieves Guild. Crouch while near NPCs to begin sneaking. A small eye icon will indicate whether the Dragonborn is hidden or seen.