The lore on 5e Revenants is pretty limited, being pretty much just the 3 paragraphs in their Monster Manual entry, which makes it hard to tell. We essentially have 2 things in there to work with, namely:
A revenant has only one year to exact revenge. When its adversary dies, or if the revenant fails to kill its adversary before its time runs out, it ...
Animate Dead has the [evil] descriptor. "This is an evil act" is right there in the spell descriptor:
Evil: Spells that draw upon evil powers or conjure creatures from evil-aligned planes or with the evil subtype should have the evil descriptor.
Good Clerics can't cast [evil] spells:
A cleric can't cast spells of an alignment opposed ...
In some sense, the problem you're having is that your necromancer is holding your plot hostage.
He's decided to try to bring these undead into the city. If you call him on it and have the undead discovered, then the player characters get in a lot of trouble, and potentially a big chunk of the adventure gets replaced with "the player characters are in ...
Dan B raises a good point - having your PC's undead troupe called out and identified is likely only going to cause issues.
However, if you have a way of controlling this - perhaps when they do get caught out, the guards issue him with a warning "Hey guy, we know you're in charge of these things, but we can't just trust you to keep them in line. You sneeze ...
Yes, this spell will control a lich.
Control Undead states:
This spell enables you to control undead creatures for a short period of time. You command them by voice and they understand you, no matter what language you speak. Even if vocal communication is impossible, the controlled undead do not attack you. At the end of the spell, the subjects revert to ...
I believe it is a matter of story, and less a matter of mechanics. Mechanically, any monster, any NPC, any curse, any trap, anything the players encounter will have a solution, a stat to beat, and you as the GM would have calculated their chances and deemed it possible for them to defeat (speaking in generalities)
The way to make the Undead scary is not to ...
You don't get a second hit
Undead Fortitude says (emphasis mine):
On a success, the zombie drops to 1 hit point instead.
This indicates that Undead Fortitude interrupts damage. Similar to damage reduction, Undead Fortitude activates after the hit but before damage is taken. Thus, the undead never reaches 0 HP if it passes the Constitution Save, and the ...
This isn't a matter of setting – it's simply because it's an over-used trope. It's a form of lazy writing / lazy scenario design.
In a D&D-genre game where the DM is not trying too hard to present a believable world, they might rely on stereotypes and stock situations with regularity: every cemetery is full of risen dead, every peasant town has sacks of ...
A skeleton cannot attune to the circlet
The circlet's description says:
This circlet is an uncommon magic item called a circlet of human perfection. Only humanoids can attune to it. The circlet transforms its attuned wearer into an attractive human of average height
Only humanoids can attune to it, but a skeleton creature type is Undead, not Humanoid.
The description in the MM seems to indicate that yes, all liches are necessarily evil:
Wizards that seek lichdom must make bargains with fiends, evil gods,
or other foul entities. [..] A lich must periodically feed souls to
its phylactery to sustain the magic preserving its body and
consciousness. [..] A creature imprisoned in the
phylactery for ...
As there is no general rule, the best I can give is what I do.
Can you see the sun?
I rule that if the creature can see the (image of) the sun, they're in sunlight. How would this fit your examples? Reflections count if they're clear enough to see the image of the sun, so mirrors count, but a building or the moon would not. Wispy clouds would not block ...
No, it wouldn't
Favored Enemy states:
Choose a type of favored enemy: aberrations, beasts, celestials, constructs, dragons, elementals, fey, fiends, giants, monstrosities, oozes, plants, or undead. Alternatively, you can select two races of humanoid (such as gnolls and orcs) as favored enemies.
An orc is a humanoid. Once it dies and comes back, the orc ...
tl;dr: Demiliches were originally weaker than regular Liches back in AD&D.
The Lich is found in the 1977 Monster Manual, and the Demi-lich is found in the 1983 Monster Manual II. The Demilich's description is a duplicate of that found in the Tomb of Horrors adventure. Back then, a Lich was what we might think of today as a template. It had the powers of ...
You don't need to change anything
As far as the rules are concerned, the alignment of NPCs is under the complete control of the DM. In the DM basic rules, page 3 under alignment, we are told (similar rules can be found in the monster manual):
The alignment specified in a monster’s stat block is
the default. Feel free to depart from it and change a
Outside materials for particular campaigns, there is only one official way for a PC to become a lich. The Book of Vile Darkness is detailed in the 5th edition Dungeon Master's Guide (p222). It doesn't describe the ritual to any great extent, leaving it largely in the GM's domain to determine what steps a character aspiring for lichhood ought to take. Some ...
Unlimited (even if you don't want to be a Beholder)
While the concept is bizarre to me, some people might not want to spend their time as a Beholder... For them, the process is actually simpler.
Attain access to Finger of Death
Wander through the land, murdering hapless peasants.
A humanoid killed by this spell rises at the start of your next turn
They remain vampire spawn, but free from the creator vampire's control
MM p. 253:
Born from Death. Most of a vampire's victims
become vampire spawn- ravenous creatures with a
vampire's hunger for blood, but under the control of
the vampire that created them. If a true vampire allows
a spawn to draw blood from its own body, the spawn
Easy bit first ...
Forbiddance. The vampire can't enter a residence without an invitation from one of the occupants.
The vampire can't - other people or circumstances can force a vampire inside. This is allowed because it is not the vampire that is doing it.
Further, once in, there is no obligation on the vampire to leave but if it does it cannot ...
A Mace of Disruption can kill a vampire outright.
You've already quoted and stated the most relevant details.
The Mace of Disruption says:
If the target has 25 hit points or fewer after taking this damage, it must succeed on a DC 15 Wisdom saving throw or be destroyed.
While the vampire's Misty Escape ability states:
When it drops to 0 hit points ...
You should be able to raise your own, other, body.
Clone only states that your other body is "inert and cannot be brought back to life", not that it is no longer a corpse.
The requirement for Create Undead?
You can cast this spell only at night. Choose up to three corpses of Medium or Small humanoids within range. Each corpse becomes a ghoul under your ...
The lore that you're describing here is technically D&D lore, but it doesn't cover all of D&D, and it isn't 5th Ed.
The only place it shows up at all is the old Forgotten Realms book Lords of Darkness (AD&D 1st edition, 1988) where a succubus kiss can create True Vampires. It hasn't been mentioned since, and it wouldn't have any influence ...
Succubi have the power to charm humanoids. Zombies are undead; they are not classified as humanoids.
MM p. 6 section Type (under Statistics) defines these separate types of creatures:
Humanoids are the main people of the D&D universe, both civilized and savage... They have language and culture, and few if any innate magical abilities…
A dead lich may be resurrected if its phylactery is also destroyed
When discussing whether true resurrection can raise a lich, there are 3 distinct cases that must be considered.
Undead/Not dead lich - cannot be targeted by true resurrection
You touch a creature that has been dead for no longer than 200 years and that died for any reason except old age. ...
YES!! It took longer than it should have but I found it.
Yes, an Undead Cleric could resurrect himself, although, not directly as would normally happen. This is assuming that, aside from his Undead state, he would otherwise be eligible for resurrection. (Mainly that he has been dead (including Undead) for less than 10 years.
First the caveats:
The first ...
The undead shadow is literally the humanoid's actual shadow, turned into an undead monster. It is not the humanoid's soul itself.
The Monster Manual entry for the Shadow states:
If a creature from which a shadow has been created somehow returns to
life, its undead shadow senses the return. The shadow might seek its
"parent" to vex or slay. Whether ...
A lich is exceptionally intelligent and careful, so this is likely to be a challenge. There are two main approaches:
Use divination magic
Use the unique properties of the phylactery to rule out which items cannot be the phylactery
Commune (5th level) allows you to ask three yes or no questions. The optimal way to use this is what is known as a ...
This limitation is defined in the spell description:
Undead and creatures immune to being charmed aren’t affected by this spell.
Skeletons are undead, therefore they cannot be put to sleep using the sleep spell.
You want the second-level wizard spell Nystul's magic aura (listed in the SRD as arcanist's magic aura). This spell can disguise your creature type. The duration is 24 hours, but if someone casts it on you 30 days in a row, it becomes permanent until dispelled.
RAW indicates No.
the ghost then disappears
in the description of Possession, together with the following listing of untargetability indicated that the ghost for the duration of the effect does not exist as an independent, locatable entity distinguishable from its host. Therefore, because the host is not undead, and the ghost does not have a ...