The fight against Martanos isn't too difficult in comparison to of the other DLC Immortal bosses. His health pool is astonishingly huge, however, as long as you've got just a bit of help from few other D2R Items players, then you should be able to take the boss down with basic defense and attack strategies. It's also possible to take him down completely him if you're powerful enough (though that's rarely an issue and will likely take some time).
While Lord Maranos might drop random rewards, the item you're really interested in is the one he's guaranteed to drop: a Zakarum Sigil. Why is that drop significant? They help you make the difficult fight for the Ancient Nightmare just a touch more manageable.
It's the first time you know about the fact that Ancient Nightmare can only be found every Wednesday and Friday at 12pm at 8:30 pm, 12 pm, and 10 pm (local servers time). If you're trying to look for the boss at any other time you'll surely be frustrated by what you do not find.
When playing the game Diablo at the right time and date However, head to your Misty Valley area of Mount Zavain. The Ancient Nightmare guards the area surrounding this Misty Valley Waypoint. If you're within the general zone, you'll be receiving an alert that indicates how the boss was summoned, and that you'll be able auto-navigate to buy D2R Ladder Items it. In addition, the boss is a giant, Xenomorph-looking creature with a glowing shield. It's pretty hard to overlook.