List of available abilities - Tiviacz1337/Travelers-Backpack GitHub Wiki
As you may know (or not know) some backpacks can provide special, mostly (not?) useful abilities. They appear while player's wearing backpack and few of them provide abilities in block form. (If you have cool ideas for abilities, feel free to report on GitHub)
New abilities available only 1.16.5+
Netherite Backpack - +4 Armor
Diamond Backpack - +3 Armor
Gold Backpack - +2 Armor
Emerald Backpack - Gives some cool particles, nothing special
Iron Backpack - +2 Armor
Lapis Backpack - Chance to multiply amount of experience which is received by player
Redstone Backpack - Redstone block in a form of a backpack. Provides strong redstone signal
Bookshelf Backpack - Holds mighty knowledge, place around enchanting table just like the bookshelf to get higher-level enchantments!
Sponge Backpack - Works like sponge block and stores water in backpack tanks. It is required to have empty or not fully water filled tanks for ability to work
Cake Backpack - Feeds you slowly with delicious pieces of cake
Cactus Backpack - Acts like real-life cacti, If it's raining and above backpack is clear sky, the backpack will fill empty tanks with water over time. If you want some more water, dip yourself! The backpack can fill with water while being a block too
Melon Backpack - Can drop up to 3 melon slices when harvested
Pumpkin Backpack - Staring at the enderman no longer makes him angry
Creeper Backpack - If player is going to die, creates explosion which damages every creature around, granting player absorption, regeneration and fire protection effects. Ability is available every few minutes
Dragon Backpack - Backpack for real warriors, combines Magma's Cube and Squid's backpack abilties, plus gives you strenght and regeneration! You'll be invincible!... but.. what did it cost?
Enderman Backpack - Extends range distance by 1 block
Blaze Backpack - Immunity to fall damage and small fireballs sent by blaze
Ghast Backpack - Ghasts see you as an allay, unless you attack them
Magma Cube Backpack - Immunity to fire damage
Spider Backpack - Have you ever tried climbing walls?
Wither Backpack - Immunity to wither effect
Bat Backpack - Provides seeing in the dark! Batman Batman Batman
Bee Backpack - Attacking creatures stings them causing poisoning, which lasts 4 seconds
Ocelot Backpack - If nearby hostile mob, grants speed effect
Cow Backpack - Cleanses all negative effects
Chicken Backpack - Have you ever wanted to be a chicken? No? Well, now you are! You'll lay eggs!
Squid Backpack - Grants water breathing and night vision effects while being in water
Old Abilities 1.12.2
Bat Backpack - Provides seeing in the dark! Batman Batman Batman
Bookshelf Backpack - Holds mighty knowledge, place around enchanting table just like the bookshelf to get higher-level enchantments!
Cactus Backpack - Acts like real-life cacti, If it's raining and above backpack is clear sky, the backpack will fill empty tanks with water over time. If you want some more water, dip yourself! The backpack can fill with water while being a block too.
Chicken Backpack - Have you ever wanted to be a chicken? No? Well, now you are! You'll lay eggs!
Creeper Backpack - Sneak on another player to make them jump in confusion as they think one of those green monsters is behind him/her. You can do it every few minutes.
Dragon Backpack - Backpack for real warriors, combines Pigman's and Squid's backpack abilties, plus gives you strenght and regeneration! You'll be invincible!... but.. what did it cost?
Emerald Backpack - Gives some cool particles, nothing special.
Pig Backpack - You'll hate this sound, believe me!
Pigman Backpack - Provides fire resistance.
Rainbow Backpack - Now all people on the server will see you! Creates a trail of notes behind player, while sprinting. Also gives jump boost and speed - isn't it cool?
Slime Backpack - Has an incredibly useless "ability". Makes the player leave a slimy trail of particles whenever is running, and make that splishy splashy squishy sound on each step as well!
Squid Backpack - Grants water breathing effect while being in water.
Sunflower Backpack - Will feed you while you stay in the sun, slowly. At the very least you shouldn't starve.
Wolf Backpack - Checks around for any wolves that may lurk around. If any of them gets mad at you, it will promptly forget about the whole deal. Also if it's full moon, you'll gain werewolf strenght!