Minecraft Dungeons:Powerful

The term powerful, often referred to as a miniboss, refers to a hostile mob that is stronger than most mobs. Powerful mobs use bossbars, like bosses, although their bossbars are smaller. In every mission, there are certain rooms that always spawn a powerful mob.

List

 * - An undead, underwater variant of the Necromancer that can summon drowned and lightning. It spawns in all the Hidden Depths missions, as well as part of an ambush in The Stronghold.
 * - A more powerful variant of the guardian that attacks with it’s lasers and spikes, but doesn’t give mining fatigue unlike the base game. It spawns in all the Hidden Depths missions.
 * - A tall, slender like creature with the ability to teleport and use powerful melee attacks. In default difficulty, it always spawns in Soggy Swamp, Desert Temple, Dingy Jungle, Overgrown Temple, Warped Forest and all of the Echoing Void missions, and can spawn in other levels in higher difficulties.