On this page of the solution Minecraft Dungeons, we will tell you the strategy to follow to defeat the boss Redstone Monstrosity in the Burning Forge level.
The Redstone Monstrosity is very powerful and very tough. Try as much as possible to attack him from behind while avoiding his attacks (picture1). He will regularly summon cubes that will attack you (picture2). So try to get rid of these enemies quickly.
Try to get away from the boss and shoot him several times while he tries to reach you (picture3). Finally, you can activate the devices in the area to create lava waves that will inflict damage on enemies and the boss (pictures4and5). But be careful, don't stay close to avoid taking damage.