Monster Monday - Mantrap: This is an enormous tropical flesh-eating plant that is found in jungle regions. In 5e lore, this creature is native to Chult, the region of Faerun where adventurers will find the Tomb of Annihilation. Working similar to a Venus Flytrap, the Mantrap attracts victims by means of a magical pollen that it sprays in the faces of humanoids, making them unable to resist walking into the monstrous plant's grasp so the unfortunate creature can be consumed. https://www.dndbeyond.com/monsters/mantrap
Monster Monday - Kruthik Hive Lord: This monster is an insectoid being that is part of a hive of similar but smaller monsters. Krithiks are burrowers that look like gigantic sand fleas, only uglier and meaner. They seek out heat and they eat live warm-blooded food, meaning that they tunnel along in their burrows and race out to attack nearby mammals and other warm-blooded beings (including humanoids) to try to sate their ever-ravenous hunger. https://www.dndbeyond.com/monsters/kruthik-hive-lord
Monster Monday - Deep Scion: The deep scion is a creature created from humanoids that have fallen overboard at sea. these unfortunate souls have falling into clutches of evil races and are subjected to horrible rituals that turn them into fully amphibious beings that are trained as assassins and sent to spy on their warm-blooded former cousins in service of their evil master. They wear the mask of a surface dweller as a convincing disguise, sometimes taking on a new identity, and sometimes taking on the guise of the person it once was. https://www.dndbeyond.com/monsters/deep-scion
Monster Monday - Clamor; CR 2; Size Medium; Type Aberration (Extraplanar, Incorporeal); Alignment unaligned; Source Fifth Edition Foes p.62 https://www.drivethrurpg.com/product/195015/Fifth-Edition-Foes
Monster Monday - Ghoulsteed Title Creed of All Flesh; CR 3; Size Large; Type Undead (Human); Alignment neutral evil.
What’s more terrifying than an undead ghoul? An undead ghoul on a horse! Now put that into your pipe and smoke it!
Source Demon Cults & Secret Societies p.59 https://www.drivethrurpg.com/product/215708/Demon-Cults--Secret-Societies-for-5th-Edition
Monster Monday - Tan-Gin CR 1/4; Size Tiny; Type Fey; Alignment unaligned.
Oriental myths are full of spirits and the Tan-Gin is one of the small ones. As an unaligned creature it could be the source of help or a cause of mischief. And as fey it may find it amusing to see the struggles of fleshbags like humanoids.
Source Monsters of the Orient p.117 https://www.dmsguild.com/product/215595/Monsters-of-the-Orient-Complete-Bestiary
Monster Monday - Ghast from D&D Beyond. A ghast is an undead that lives in swamps and other places of decay. As such it has a powerful stench that poisons anyone who fails a saving throw against the effect. It also resist being turned by gaining advantage on any spells that try to turn it. https://www.dndbeyond.com/monsters/ghast
Monster Monday - Drow Assassin from D&D Beyond. Drow Assassins are finely-trained killers in service of the nobility and priesthood of Lolth that seek out and eliminate the enemies that their masters instruct them to slay. https://www.dndbeyond.com/monsters/drow-assassin
Monster Monday - From D&D Beyond Skum - These are souls that have succumbed to an aboleth's magic, and they barely resemble their past forms, their skin turning slimy and translucent while their limbs warp to resemble those of deep-sea oddities. They attack with both weapons (trident) and psychic damage through a mind-breaking touch that can be lethal since it also confers disadvantage on Wisdom saving throws in addition to dealing direct damage. These nasty critters are part of the Ghosts of Saltmarsh supplement in D&D 5e.
Monster Monday - From D&D Beyond Poison Weird - A Poison Weird is a variant of the elemental creature known as a Water Weird. This variant lives in vats of poison or toxic liquids, and it tries to kill prey by both drowning it and dealing poison damage to it while a creature is grappled by the Poison Weird. This lovely creature features in the Dungeon of the Mad Mage adventure for D&D 5e.
Monster Monday - Riding Horse. This is your standard everyday D&D driver; nothing fancy, nothing exotic. It will simply get your from Point A to Point B more quickly than walking there yourself. https://www.dndbeyond.com/monsters/riding-horse
Monster Monday - Reduced Threat Aboleth (from Dead in Thay). This is a weakened aboleth. It still has all of its normal powers, but it has reduced HP and it gets a -2 penalty on all ability checks and saving throws. It's still a pretty nasty and potent enemy. https://www.dndbeyond.com/monsters/reduced-threat-aboleth
Monster Monday - Quasit (familiar variant) - This is a tiny fiend hat can go invisible, is immune to poison, can polymorph into a bat, toad, or centipede, and has darkvision. Because the claws of the quasit are poison, it is also a familiar that can attack and is thus not suitable for most low-level PCs. https://www.dndbeyond.com/monsters/quasit-familiar-variant
Monster Monday - Centaur Mummy https://www.dndbeyond.com/monsters/centaur-mummy
The Centaur Mummy is a guardian from The Hidden Shrine of Tamoachan adventure. Far from being the mostly-good druidic friends of the forest, this undead fiend is bad news and has a bad attitude toward everyone. Probably even the necromancer who created it is glad he’s dead so he doesn’t have to deal with this guy any longer.
Have you ever faced a Centaur Mummy or have you ever used one as a DM to fight against a party of adventurers?
Monster Monday - Balhannoth https://www.dndbeyond.com/monsters/balhannoth
Balhannoths are terrifying aberrations that dwell primarily in the Underdark and the Shadowfell. They look like eyeless beholders with long tentacles, each of which has a paddle-like appendage that has sharp tooth-like spines on it. The Balhannoth cannot fly, but it can teleport and go invisible and it attaches to ceilings and overhanging branches and other types of things where it waits for prey. It can use legendary actions to teleport away with a creature it has just attacked and grappled, and it can use powerful psychic attacks to make passing sentient beings believe they are close to places of safety or close to something that is their heart’s desire.
Have you ever fought a balhannoth? Have you ever used one against a party of adventurers in a campaign you were running?