Are plants creatures or objects?

This has occurred to me due to conflict between Fabricate and Blight, Fabricate says it can not target creatures and lists trees as example targets, Blight on the other hand can only target creatures and lists mundane normal plants as example targets.
So, which of these conflicting spell descriptions is correct?

Note:
It also occurred to me that plants might also be whichever one is convenient, unlikely but possible.

Which creatures count as “entities from the shadowfell” for the purpose of a Shadow Magic Sorcerer’s origin?

The description of the sorcerer subclass “Shadow Magic” (XGtE, p. 50) starts off with the following paragraph (emphasis mine):

You are a creature of shadow, for your innate magic comes from the Shadowfell itself. You might trace your lineage to an entity from that place, or perhaps you were exposed to its fell energy and transformed by it.

Off the top of my head, I can only think of Shadar-Kai (MToF, p. 62). Other than that, I can’t think of suitable creatures – Darkmantles or Skull Lords among those not even humanoid, and it’s hard to imagine Meazels (MToF, p. 214) or Skulks (MToF, p. 227) having any offspring.

Are there any entities in the Shadowfell known from 5e or previous versions, aside from the Shadar-Kai, that are known to reproduce with other humanoids?
Or does “entity” include an immaculate conception from the Raven Queen? 😀

Can incorporeal creatures speak?

I got to thinking about how exactly incorporeal creatures interact with the corporeal world and I wasn’t exactly coming up with anything that explicitly stated whether they could communicate or not. Like, sure, maybe they can speak to other incorporeal creatures, but what about using an incorporeal creature or spell to send a message to a corporeal one? Would that be possible? It seems like they can’t really interact physically with the corporeal world, and can be heard moving if they want to be heard, but… nothing says anything about talking, and I’m now very curious as to whether there’s an answer to this.

Can an intellect devourer use Devour Intellect while it inhabits a creature’s body?

In the MM (p. 191), it says that an intellect devourer, while using its Body Thief action:

retains its Intelligence, Wisdom, and Charisma scores, as well as its understanding of Deep Speech, its telepathy, and its traits. It otherwise adopts the target’s statistics.

Is Devour Intellect, an action that the intellect devourer has, considered to be a trait?

It appears to me that the traits are from its ability scores to the actions in the monster stat block, so it wouldn’t be able to use Devour Intellect while controlling another’s body.

Anybody have any insight on this?

Is there a way to animate undead creatures beyond existing spells’ restrictions, such as size?

In Dungeons and Dragons 3rd edition they introduced skeletons with all kinds of sizes such as Tiny, Small, Medium, Large, Huge, Gargantuan, and Colossal.

As a necromancer, it would be really entertaining to have undead of all kinds and sizes. However, Dungeons and Dragons 5th Edition limits the abilities of a necromancer, as the spell animate dead only allows the caster to reanimate Small and Medium humanoid creatures. Though it’s understandable that WOTC made it this way as a way of balancing to prevent the creation of overpowered undead armies, it would be interesting for some sort of way of animating a creature larger than medium.

Personally, I like the idea of having a Gargantuan humanoid skeleton; however, I would not be sure how to apply statistics to an undead or create a proper way of balancing.

There is a section in DMG p. 282 for skeleton and zombie templates, however, the largest creature that exists with a humanoid body is a hill giant categorized as huge. Even then the challenge rating is 5 making thinking of a way of balancing difficult.

Even beyond my desires, I’m sure there are many other necromancer-loving individuals who would desire to animate and control a minotaur skeleton, or any other undead such as beasts or monstrosities.

Is there a way (even house or homebrew rules) of animating undead beyond these restrictions?

Does this Wild Magic result affect the sorcerer or just other creatures?

A result of 75 or 76 on the Wild Magic Surge table triggers this effect:

You glow with bright light in a 30-foot radius for the next minute. Any creature that ends its turn within 5 feet of you is blinded until the end of its next turn.

Does this blindness affect the sorcerer who triggered the surge (since she will always be within 5′ of herself?

Or are only other creatures affected by it?

Can creatures other than devils make pacts enforceable by the ruby rod?

Inspired by Can PCs create their own magically enforceable contracts? it occurred to me that the usual enforcement of contracts is the natural law enforced by the ruby rod owned by Asmodeus (If I am remembering my lore correctly).

Has there ever been any rules or lore in any edition that allows non devils to make those contracts enforced in the same way?