Minecraft Dungeons:Magma Cube

The Magma Cube is a new hostile mob in Minecraft Dungeons that will come with the Flames of the Nether DLC. The only proof of its existence is from a tweet from Minecraft Dungeons about the DLC.

Behavior
They will most likely to behave like slimes, but may potentially burn the player, other than that, not much is known of its behavior.