Minecraft wiki entry for 2010_Indie_of_the_Year_Awards, associated text: Ghasts: flying ghosts that shoot exploding fireballs at the player.
Zombified piglins: wield golden swords and attack in hordes if provoked.
Piglins: can barter to provide ingredients or blocks.
Wither skeletons: tall skeletons that wield stone swords and drop coal or, occasionally, wither skeleton skulls that can be used to summon an optional boss: the wither.
Blazes: shoot fireballs at players and hover above the ground.
Magma cubes: similar to Overworld slimes, but they are fire resistant and do more damage.
Striders: are the only passive mobs naturally spawning in the Nether, which can walk on lava and be ridden with a warped fungus on a stick.