Some item ideas:

Common items: (to drop ~70% of the time)

• ‘They taste funny…’ – 16 Pumpkin Pies
• ‘Hello darkness my old friend’ – Player gains blindness II for 1 minute
• ‘Makeshift Lanterns’ – 8 Jack O’lanterns
• ‘Block o’Flesh’ – 8 Netherwart blocks
• ‘Fire burn…’ – 1 Flint and Steel
• ‘…and cauldron bubble’ – 1 Cauldron

Rare items: (to drop ~25% of the time)

• ‘Tainted Skull’ – 1 Wither Skeleton skull
• ‘Hunger Pains’ – Custom potion giving Health Boost III and Hunger III, for 8 minutes (Bloody Mary was too much)
• ‘Head Snatcher’ – 1 Pumpkin with curse of binding (credit for idea @ministermooself )
• ‘Bloody Axe’ – 1 Iron Axe with Smite V, Unbreaking III, Curse of Vanishing

Best items: (to drop ~5% of the time)

• ‘Pandora’s box’ – 1 Shulker Shell
• ‘Bone Picker’- Diamond Sword with Sharpness V, Unbreaking IV, Looting IV