Can a character without arms cast spells with somatic components?

My DM and I have been having friendly arguments, and we recently came to what would happen if my character lost all their limbs.

As a gnome beastmaster I said I would always sit on my mount and use mage hand (from magic initiate) when I need to eat or lift things. HOWEVER he argues I wouldn’t be able to perform the somatic component.

So, I ask: is there a way to cast spells without arms? My argument is that since I am learning the cantrip after losing my arms I would have learned it in a way that works with my stumps, but he points out the PHB is pretty clear you need a free hand.

Can I counterspell a Subtle spell without material components?

1 reaction, which you take when you see a creature within 60 feet of you casting a spell.

Can I Counterspell a creature that completely eliminates component requirement?

Subtle Spell
When you cast a spell, you can spend 1 sorcery point to cast it without any somatic or verbal components.

If the spell is subtle then can I see it’s being cast in order to counterspell it?

DR with multiple components

How does DR with multiple components work?

Take a vampire for example. DR 10/Magic and Silver.

A +3 weapon overcomes DR/Silver. Does this mean that a +3 weapon overcomes both the magic and silver component of the DR? If this is the case, why do creatures with epic DR have any other DR types? Pazuzu has DR /Epic, Silver and Good, but an Epic weapon would already overcome both DR/Silver and DR/Good, so why even add them? If this is just for the edge cases where an Epic weapon has a low base plus, than why do artifacts like St. Cubert’s Mace specifically say they act as cold iron/silver?

Does the weapon have to ‘separately’ overcome each resistance? In this case, one ‘plus’ of the weapon would be used to overcome the magic resistance, and the remaining +2 would be insufficient to over come the DR/Silver.

Perhaps the plusses can’t overcome it at all? +3 weapons only overcome DR/Silver alone, but even a +5 non-silver weapon can’t overcome it because there’s no provision for it to overcome DR/Magic and Silver.

Please, this is killing me.

How would you rule on casting Scrying without material components?

Scrying has an M requirement of

a focus worth at least 1,000 gp, such as a crystal ball, a silver mirror, or a font filled with holy water.

While not explicit, this focus is presumably used to actually see and hear the target of the spell (e.g., this question).

Aberrant Mind Sorcerers can retrain one of their Psionic Spells for Scrying, and this feature allows them

to cast the spell using sorcery points, [requiring] no verbal or somatic components, and [requiring] no material components, unless they are consumed by the spell.

Since the focus is not consumed by Scrying, would you allow casting the spell this way? If so, how would you rule the scrying happens?

Does a warlock require material components for a Mystic Arcanum spell?

The description in the Warlock class says only:

At 11th level, your patron bestows upon you a magical secret called an arcanum. Choose one 6th-level spell from the warlock spell list as this arcanum. You can cast your arcanum spell once without expending a spell slot. You must finish a long rest before you can do so again.

It says nothing about having or needing the material components for the Mystic Arcanum spells. This becomes very important for spells such as Forcecage or Plane Shift.

Material components for Commune spell [duplicate]

The spell Commune specifys

(incense and a vial of holy or unholy water)

obviously, holy water and incense have a definition but I couldn’t find a definition or cost for "unholy water". Since it is assumed that a component pouch/focus ignores material components without a GP cost, would you have to pay for the incense and holy water?

What is "unholy water"? related to the definition of unholy water however no RAW answer

Can a spellcasting focus be used in the casting of a spell with no Material components

I have looked for any rules on this and cannot find any, and before you say "It doesn’t matter flavour however you like" I have a specific example.

In the alchemist subclass for the artificer class the 5th level feature alchemist Savant reads:

Whenever you cast a spell using your alchemist’s supplies as the spellcasting focus

does this mean that if the spell has no matterial componants that it cannot use this feature?

If a spell is twinned, does the caster need to provide costly material components for each target?

The Divine Soul Sorcerer can gain access to the revivify spell pretty easily (along with other costly resurrection spells), which has a costly material component that the spell consumes (300 gp worth of diamonds).

If after a particularly rough battle, can the Sorcerer use revivify on two separate creatures who have died for the cost of just 300 gp worth of diamonds or would it require 600 gp worth?

For the sake of this question, assume that a dead creature is a creature and not an object. If it helps, you could consider the stoneskin spell as well.

Does a spell with verbal components that is cast because of Contingency take effect in a Silence spell?

I GM a campaign where the main villain is a 20th level wizard called EM (short for Evil Mage), with the spells contingency and dimension door. EM has a contingency spell, set to go off when xe drops to below 1/3 of xer max HP, with dimension door as the contingent spell (teleporting xem 450 feet straight up, although the destination really doesn’t matter).

Today, one of the players cast silence on EM, preventing xem from casting spells (they were in a space where EM couldn’t move out of the silenced area), and eventually the other players brought EM to 1/3 of xer max HP.

However, when I said that xe flashed away, the player argued with me, saying that the silence spell prevented casting spells with a verbal component, and because dimension door has a verbal component, it can’t be cast in the silenced area, even if it was cast by contingency. I said that no, the spell was already cast when the contingency was cast, so it didn’t need verbal components and silence didn’t prevent it from going off.

Does a silence spell prevent a spell with verbal components cast through contingency from going off?

RAW, can Mordekainen’s Magnificent Mansion create components for activities/spells?

Suppose I wanted to repair a simulacrum.

Am I able to cast magnificent mansion and furnish it such that the materials required to repair the simulacrum are inside the mansion, thus circumventing the cost of repairing the simulacrum?

Magnificent mansion is worded as follows:

You can create any floor plan you like, but the space can’t exceed 50 cubes, each cube being 10 feet on each side. The place is furnished and decorated as you choose.

Simulacrum repairs are worded as follows:

If the simulacrum is damaged, you can repair it in an alchemical laboratory, using rare herbs and minerals worth 100 gp per hit point it regains.

I would like to:

  • Have a greenhouse in the mansion furnished with the rare herbs that I require,
  • Have a small mine or mineral vein in the mansion furnished with the rare minerals that I require,
  • Have a tool closet in the mansion furnished with the tools that I would need to harvest the aforementioned rare materials, and
  • Have some sort of workshop/alchemical laboratory that I can use to perform the repairs?

As a follow-up question, suppose I wanted to cast a spell with expensive material components such as gate, which requires a diamond worth 5,000 gp. Is the mansion able to be created with the diamond already inside so that the caster can simply cast magnificent mansion, go inside and then cast gate or whatever expensive spell I want?