Obtained by killing a zombie.
Player suffers from no hunger status after eating rotten flesh when equipped.

Obtained by killing a spider.
Reduces damage received by 15%, but increases damage received from fire by 15%

Obtained by killing a witch.
Player gets 2 seconds of regeneration effect on killing a mob, and 2 seconds of slowness on getting hit by a mob

Obtained by killing a skeleton.
Allows player to walk/run on soul sand with approx nomral speed.

Can be found in a village chest.
Drops smelted ores instead of raw ores.

Can be found in a mineshaft chest.
Gives player haste 1, and a small percent chance to drop a random smelted ore while mining a ore.

Obtained by killing an iron golem.
Gives player resistance effect when at less than or equal 3 hearts.

Can be found in a nether fortress chest.
Gives player +1 hunger point every 15 seconds.

Obtained by killing a cave spider.
Gives player poison immunity.

Can be found in a nether fortress chest.
Restore 0.5 heart per hit to a mob.

Obtained by killing a frog.
Gives player jump boost effect.

Obtained by killing an enderman.
Gives player speed boost effect.

Obtained by killing a magma cube.
Gives player 50% damage reduction from any source of fire/burn.

Obtained by killing a hoglin.
Gives player more knockback to every melee attacks.

Obtained by killing a creeper.
Gives player aboloty to walk on powdered snow and magma blocks.

Obtained by killing a withered skeleton.
Gives player immunity to wither effect and gives +1 hunger every 20 seconds at night time.

Can be found in a shipwreck chest.
Gives player to affect poison damage to mob on every hit.

Obtained by killing a piglin.
Gives player to affect fire damage to mob on hit.

Obtained by killing a gaurdian or an elder guardian.
Gives player dolphin's grace and immunity to mining fatigue.

Obtained by killing a shulker.
Gives player slow falling effect.

Obtained by killing the wither boss.
Gives player resistance, regenration and absorption if player has less than or equal to 2 hearts.

Obtained by killing an ender dragon.
Gives player random basic buff every 10 seconds for a total of 10 seconds.

Obtained by killing an ender dragon.
Gives player a good buff and a debuff every 20 seconds for a total of 15 seconds.

Obtained by killing a piglin brute.
Gives player's 2x times XP from all sources of xp.

Can be found in a bastion remenant chest.
Gives player regeneration and strength effects.

Obtained by killing the warden.
Every throw of a trident with channeling causes lightning to strike(regardless if there is a thunderstorm or not)