Minecraft Dungeons:Elder Guardian

The Elder Guardian makes its only appearance in the Hidden Depths DLC as the mob that has been dominated by a shard from the Orb of Dominance, hence its very End-like appearance. It’s dominated boss variant appears similar to an Elder Guardian’s appearance, but is purple colored and has a pink eye. Other than this, it is not known of their appearance, behavior, or if they're in the DLC.