Sometimes Dungeon Masters gravitate to all the new and interesting monsters, but there is a treasure trove of traditional D&D monsters that I encourage you to not overlook. I highlight four traditional monsters for your consideration:

1. Roper
2. Xorn
3. Ettin
4. Beholder

Roper

“Camouflaged as rock formations, ropers are aberrant ambushers that lurk in wait for smaller creatures. These bizarre subterranean hunters extend their rubbery tentacles to explore and prod their surroundings, often reaching beyond their fields of vision. Should they encounter prey, these limbs ensnare victims and drag them close to ropers’ toothy maws. If these tentacles are severed, ropers rapidly grow replacements.

Ropers can move, albeit slowly. Crawling on the sticky cilia that cover their undersides, ropers can climb walls and suspend themselves from ceilings. These hunters often position themselves in unexpected or treacherous locations, using their surroundings to weaken their prey. Roll on or choose a result from the Roper Hazards table to inspire what dangers ropers employ when ambushing prey.” – Monster Manual 2024

Ropers are excellent adversaries due to their number of attacks and grapple condition. They are easy to upthreat by also adding more tentacle attacks or increasing damage. Regardless, they can provide and excellent challenge for parties in traditional dungeons especially when the party realizes that they can regrow tentacles.

Xorn

“On the Elemental Plane of Earth, xorn roam in search of meals they consider delicacies: gems, crystals, and veins of precious metals. For xorn, the Elemental Plane of Earth presents an endless buffet. Those that find their way to the Material Plane discover that most worlds are culinary wastelands. These xorn scour subterranean depths, consuming whatever sparse gems and ores they find. This might bring them into conflict with miners or others who hide their treasures underground.

Xorn have three eyes, three arms, and three legs arranged around their trilaterally symmetrical frames. At the top of their bodies is a toothy maw that’s equally capable of crushing minerals and dangerous creatures. Xorn move through the earth magically, leaving no tunnel or sign of their passage.

Rapt gourmands, xorn focus on their next meals. They care little for living creatures and avoid harming them when possible. They know others also covet the earth’s treasures, and they’re not above bargaining for their meals. Xorn might share their knowledge of the Underdark in exchange for snacks of gems, coins, or magical metals. If starving or angered, xorn might try to forcibly take their meals.

Roll on or choose a result from the Xorn Delicacies table to inspire a xorn’s favorite fare.” – Monster Manual 2024

Xorn’s are a dual threat to deal significant damage AND eat treasures right in front of party members, both of these can provide a unique threat to characters, especially with four attacks. One additional feature of the Xorn is also the ability to burrow through rock to either retreat or attack.

Ettin

“Ettins are physically powerful Giants with two heads. While many ettins have features similar to hill giants, others have more bestial or unusual traits, such as tusks, short horns, or a single eye on each head.

Ettins frequently ally with other Giants or groups that value their strength, such as hill giants, bandits, or ogres. Some ettins possess mystical ties to the lands they inhabit, and they might know or guard secrets valued by druids or Fey.

Each ettin head has a distinct personality. While this makes some ettins quarrelsome with themselves and others, many function as a team. An ettin head might have its own name, or both heads might refer to themselves as a single being—either with one name or a portmanteau of two.

Roll on or choose a result from the Ettin Interactions table to inspire how an ettin’s heads are interacting when the creature is encountered.” – Monster Manual 2024

Ettins are huge beasts that deal damage with both of their attacks. They also have significant hit points to provide a real challenge to defeat. Don’t forget that Ettins are a great twist to Ogres and Giants.

My favourite homebrew is to provide each head some kind of personality and implement hit points assigned to each head to increase the challenge.

Beholder

“Beholders—also known as eye tyrants—number among the most notorious inhabitants of the Underdark. Few creatures in the multiverse are as loathed and feared as these maniacal horrors.

A beholder’s distinctive, globular body is dominated by an oversize maw and a gigantic central eye. Ten stalks ending in smaller eyes crown its form. From each of these eleven eyes, a beholder can unleash a different magic power. The central eye can deactivate magic, while the smaller eyes emit rays that inflict various dooms—such as petrifying creatures, disintegrating them, slaying them outright, or other effects.

Beholders possess utterly alien minds. Most exhibit paranoid, narcissistic, and megalomaniacal tendencies, and they act on agendas beyond human reasoning. While some keep to themselves, others force weaker creatures into their service. Still others cultivate grand ambitions, creating networks of minions to manipulate groups, settlements, and whole nations in the Underdark and sometimes the surface world.

Few creatures loathe beholders more than other beholders. Every beholder views itself as the physical and intellectual pinnacle of its species. To them, all other beholders are aberrant rivals to be dominated or destroyed. Conflicts between beholders can last for decades and lay waste to vast subterranean realms.

Beholders are a particular threat to adventurers because both gravitate toward mysterious ruins and sites of great magic. Many beholders collect the magic items and petrified bodies of heroes they’ve defeated, displaying them as trophies.” – Monster Manual 2024

Perhaps the poster child for many a Monster Manual, Beholders are a great challenge for any party. Beholders can provide a real threat with almost 200 hit points and ten different eye rays to challenge any party. If that isn’t enough, the Beholder has a couple of Legendary actions to further add to the challenge – Chomp and Glare!

Beholders can also be used with Spectators and Zombie Beholders to create a horde to challenge any party!

Bonus Monster – Gelatinous Cube

“Quivering masses of acidic goo, gelatinous cubes wobble through narrow caverns and dungeons, engulfing anything in their paths. These Oozes are naturally transparent, making them difficult to see while they’re stationary. Creatures and objects that become stuck within these slimes are gradually dissolved. Undigested detritus sometimes floats within a gelatinous cube, hinting at its past meals. Roll on or choose a result from the Gelatinous Cube Debris table to inspire a gelatinous cube’s contents.” – Monster Manual 2024

I don’t think there is anything more traditional than a Gelatinous Cube. They can provide a passive opponent that characters need to find a way through or retrieve an item from to provide that extra challenge. The acid damage and suffocating risks are real threats to any party.

Summary

Although new books are enticing and novel, I encourage everyone to review the original Monster Manuals books – there are some timeless opponents to challenge players young and old.