If you don't use immune foes when you were planning on doing so then you are invalidating this players choice, and taking away the agency they showed during character creation.
You will also impact other players who might wonder why you aren't skirting around their weaknesses - or worse, why they bothered to create rounded characters instead of ...
Yes and No. But mostly Yes.
It makes spellcasters worse, by making some spells worse. In particular, the spells you mentioned, i.e., spells that rely on a Duration. Notably, however, other spells are completely unaffected - Eldritch Blast, Fireball, or anything else with Duration: Instantaneous.
Furthermore, not only spellcasters get screwed. The Barbarian ...
I would say no to both copying and casting Wizard spells above level 1, based on the spellcasting rules under multiclassing on pg 164 of the PHB:
You determine what spells you know and can prepare for each class individually, as if you were a single-classed member of that class
I read that as saying that you would count as a level 1 wizard, which comes ...
Not all scrolls are Spell Scrolls. There is a Scroll of Protection. Granted the list of scrolls that NOT spell scrolls is limited to that one scroll. The section on page 200 is specific to Spell Scrolls.
The effect of the two rules is that anybody that can read a written language can use a Scroll of Protection while you need the spell to be in your class' ...
Remember in D&D RAW, specific overrides general.
The general rule for scrolls "any creature that can understand a written language can read the arcane script on a scroll and attempt to activate it" is overridden by the specific rule for Spell Scrolls: "if the spell is on your class's list you can use an action to read it...otherwise the scroll is ...
Yes. Any character who is proficient with a particular type of armor can cast spells while wearing that type of armor with no penalty.
There are two primary reasons for this.
There are better ways for mages to get a decent Armor Class. For example, Draconic Sorcerers get permanent Mage Armor for free at 1st level, which provides 13 + Dexterity Modifier AC. ...
You indicated that the player has an interest in picking utility spells when a suitable lightning based spell is not available. I recommend steering the players towards spells whose utility can make a big difference in a fight - there are many useful spells in this category. Also, steer them towards metamagics that can increase their ...
There are a number of different strategies one can take (besides the possibly obvious: remove material spell components/focuses/holy symbols/etc.):
Make the jail special
Suppress sound (e.g., permanent or ongoing silence) to eliminate verbal spell components
Suppress light so that the spell caster cannot, for example, target individuals or locations via ...
That would be very powerful.
Let's compare the effect with the other things Wish can do:
You grant up to ten creatures you can see immunity to a single spell or other magical effect for 8 hours
You undo a single recent event by forcing a reroll of any roll made within the last round
You grant up to ten creatures that you can see resistance to a damage type ...
Sorcery points are not restricted in which spells they can affect.
Other class features similarly work between classes, as the classes merely grant abilities and few of them state that they have any form of exclusivity. Metamagic abilities and other methods of spending Sorcery Points are not restricted to only affecting Sorcerer spells.
Considering that in ...
The limit is 142 times
Each ritual adds 10 minutes and most spells take 6 seconds1, there are 60 minutes in an hour, 24 hours in a day so 144 lots of 10 minutes, lose just under 15 minutes for the normal casting time so 142 is the maximum. This is likely to be “as many times as the wizard wants” unless his wants are excessive.
Kidding aside; your ...
Taking your hand off the weapon should not require any action expenditure - you are just letting go of it, same as if you dropped it.
You can then use your free object interaction to restore your grip after casting.
The PHB Errata says:
Two-Handed (p. 147). This property
is relevant only when you attack with the
weapon, not when you simply hold it.
A long rest is interrupted by giving up on it
The text is ambiguous, but 1 hour is meant to apply to the whole period of strenuous activity, while the list is there to define what types of activities could make up that strenuous activity period. The intention is that the rest has to be started over not just for any interruption, but for those unusual times ...
Going in a slightly different direction: don't go overboard. Most small-time prisons probably have a few minor defenses against spellcasters. They'll have their stuff taken, they'll be behind iron bars, if the jailor expects them to be spellcasters he´ll wear earplugs and hang the key on a 20 pound weight so it can't be Mage Handed and it´ll probably be dark,...
There is a big difference between 'Spells Prepared for the Day' and 'Spell Slots.'
The spells you prepare is the library of options you have to pick
from when you go to cast a spell.
A Spell Slot is the 'fuel' that makes a spell work.
So, when you want to cast a spell, you pick any spell you want from your prepared 'library', pair it up with an ...
Yes, you can do this
That's how it goes. Spell slots are regained at the end of a long rest, and there's no rule forbidding spellcasting during a long rest.
It's effective and somewhat cheesy, but not as broken as it might sound at first. To cast that spell before ending the rest, you need to save up a slot for it. If you intend to do this constantly, you ...
About the Rules
You are correct that even if you can do something as much as you want, it still takes time to do. Something that takes your action in combat should not be do-able more frequently than once per 6 seconds outside of combat most of the time (there can be some exceptions, but spellcasting would not usually be considered a candidate for that). So ...
You can end concentration at any time (no action required).
As it says above, you can end it at any time, no action required. It means you don't need to use a reaction, so you can elect to just end it.
Which means yes, you can end your concentration as an enemy approaches so that you drop out of their reach.
Only if one of your classes matches the feat
For example, if you are a Cleric then you can use a spell slot to cast the 1st level spell learnt from the Magic Initiate (Cleric) feat.
If you are not a Cleric then you can't.
From the Sage Advice Compendium:
If you’re a spellcaster, can you pick your own class when you gain the Magic Initiate ...
The warlock 'upcasts' naturally
Warlocks don't have the options to choose what level of spell slot they use to cast a spell, as other casters do. Their Pact Magic feature assigns a single spell level for all their spell slots, and all their spells are cast at that level.
The Warlock Table lists what level their spells are cast at, which depends on their ...
Player's Handbook p.203
Once a spell is cast, its effects aren’t limited by its range, unless the spell’s description says otherwise.
From your example, Heat Metal says:
Until the spell ends, you can use a bonus action on each of your
subsequent turns to cause this damage again.
There is no range or LoS limit on this - they can run but they ...
Only if it is a ritual, and is cast as one
A wizard must prepare a list of spells they have available to cast. Available spells do not depend on being in or out of combat, but are simply the spells the wizard has at their disposal. A wizard could cast a cantrip without "preparing" it, but cantrips are not spells "from his [spell]book". The only way to cast ...
Ritual spells can't be cast at higher levels unless you spend a spell slot
The rules for rituals state that:
The ritual version of a spell takes 10 minutes longer to cast than normal. It also doesn't expend a spell slot, which means the ritual version of a spell can't be cast at a higher level
This means that when casting as a ritual the spell must be ...
The caster continues casting the spell.
Taking the same quotes from @Xirema's answer, we have the following for casting spells with a long casting time:
Certain spells (including spells cast as rituals) require more time to
cast: minutes or even hours. When you cast a spell with a casting time
longer than a single action or reaction, you must spend ...
You still suffer.
The stress of casting this spell...
Mystic Arcanum says:
You can cast your arcanum spell...
You are still casting wish so the consequences apply. There are no secret rules. If the Genie Patron changed how wish functioned, it would say so.
This makes sense from a game balance perspective: risk-free access to the wish spell is ...
"1/X Caster" is shorthand for how quickly a character gains "spellcaster levels" (and with them, more spell slots)
The progression for each of these spellcaster types looks like this, with the first column representing Character Level as a Single-classed X and the other columns representing the "Spellcaster Level" they have as ...
Yes. In 5e, prepared spells remain available as long as they're prepared.
From the D&D Basic Rules (e.g. from the cleric's or the wizard's Spellcasting feature):
Casting the spell doesn't remove it from your list of prepared spells.
Basically, 5e Wizards (and Clerics) are 3.5e Sorcerers who can swap out their "known spells" based on their ...
The Spellcaster would lose the spell
This is relatively straightforward. The rules for spellcasting state unambiguously that a caster casting a spell with a long casting time must use their action each turn to cast it:
Certain spells (including spells cast as rituals) require more time to cast: minutes or even hours. When you cast a spell with a casting ...
Only if the spell says so
There are spells that can direct multiple attacks against the same target, but they use different language. Instead of saying to choose a number of targets, such a spell says that it creates a number of attacks (or strikes, or missiles, etc.) and then requires you to choose a target for each attack. Some spells that use this ...