Remember, you can only have one ability active at a time. If you have two items equipped, the second item will NOT work until the first is removed. Also, if you have an item equipped when you die, it will NOT work until you take it off and put it back on.
Gold Helmet – Mining Helmet
Lucky Blocks
Phantom Membrane – Gives ghost qualities
Leather Boots – Speed Boots
Mini Mushroom – Shrinks you
Turtle Helmet – Continuous water breathing
Skulls – Turn you friendly to that mob type
Big Mushroom – Makes you bigger
Feather – Slow falling
Trident – Fast swimming
Zombie Skull – Be a zombie, ride zombies and spawn zombies from chicken eggs!! – Dropped from Zombie Giants
Conduit – Conduit Powers
Wither Skull – Immune to wither – Drops naturally from Wither Skeletons
Dragon Skull – Be a young dragon or teleport like an enderman! – Found naturally in end cities
Skeleton Skull – Increase your bow abilities – Drops from a Giant Skeleton
Player Skull – Ignore gravity!! – Drops from a Zombie General
Creeper Skull – Shoot bomb arrows. Become a charged creeper!! – Drops from a Giant Spider