Minecraft Dungeons:Powerful Mobs

A mini boss is a mob that is stronger than most mobs. Mini bosses use bossbars, like bosses, although their bossbars are smaller. The mobs in bold can also spawn as bosses. The chance of a mob to be replaced by a mini boss is 1%. There are mobs that can be defined as mini bosses, but don't use a bossbar, like the rampart captain.

Mainland Mini Bosses

 *  - Stronger than the default game's enderman, but can take damage from projectiles. It can be found for the first time in the Soggy Swamp. When encountered, this boss music plays: Enderman. Also Endermen in the End DLC are just regular hostile mobs. It also spawns as a boss in the Creeper Woods.
 *  - Illager spell-caster and a powerful mage, it can summon evil ghost soldiers known as vexes. It first spawns as a mini boss and boss in the Pumpkin Pastures and as a miniboss on later levels. When encountered as a miniboss, this music plays: Evoker.
 * - An armored skeleton riding a skeleton horse; they usually come in up to groups of 2-4, remembering the four knights of the Apocalypse referenced in the bible. They can be found for the first time in the Cacti Canyon. When encountered, this music plays: The Four Horsemen.
 *  - Created in the Fiery Forge, stronger then the iron golem, but weaker than the Redstone Monstrosity. It spawns as a boss in the Redstone Mines and as a mini boss later. When encountered as a miniboss, this music plays: Redstone Monstrosity. This miniboss also uses the same boss music as the Redstone Monstrosity.

DLC Mini Bosses

 *  - Illager spell-caster and magical archer, that summons illusions of itself, spawns as a mini boss and boss in the Lost Settlement and the Frosted Fjord and a miniboss in the Lone Fortress. They also spawn in the Howling Peaks levels. When encountered as a miniboss, this music plays: Evoker. This miniboss uses the same boss music as the evoker.
 *  - Much more powerful then it’s base game variant. Attacks by shooting fireballs. Spawns as a boss in the Basalt Deltas and Crimson Forest and can appear as a mini-boss in those same levels. When encountered as a miniboss, this music plays: Ghast.