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Smacc
He was an iron golem that along with Protecc and Attacc helped keep the villager vending machine safe. He originatedfrom a village north-west of the Flying Fortress, and was brought to the vending machine with a lead.
He died in the 11th episode of the series ("We Lost Three Friends In Minecraft Hardcore..!). How it happened is uncertain, but he likely despawned due to there being no inventory where he was.