Captain Wither Skeleton
This is the captain of all raiders. It spawns in nether fortress. Killing the Captain will give you "Wither Omen" Effect, just like "Bad Omen".
Voluntary Exile
Killing the Captain grants you this achivement.
Captain's Helmet
This is a golden unbreakable helmet, just like "Ominous Banner", but can be used to befriend piglins during raids, because if you don't wear golden armor, piglins will assume you a raider, and attack you.
Lava-free Bastion Remnant
Lava has been removed from Bastion Remnant for an easier fight. Entering a bastion with Wither Omen Effect will start the raid.
Wither Skeletons glow red
This is an advantage for players to find wither skeletons quickly. But be aware that, they don't glow very commonly.
Piglins reveal their location
You can see piglins through walls whenever they glow and give them assistance as quick as possible.
Ability To Respawn
Whenever a raid starts, some piglins will place Charged Respawn Anchors on the ground to help players respawn.
Raid - Victory
If you win, then you will get this achivement and all piglins will treat you like a friend (only when golden armor equipped), but this time, piglins will actually defend you from other mobs or players if nearby.
What if.. Raid - Defeat?
If wither skeletons manage to kill all the piglins, then piglins will no longer spawn inside that Bastion Remnant. Only Wither Skeletons, Blazes, Skeletons will spawn.