How many spell slots does a Level 3 Warlock have?

The Warlock Table in the PHB (p106) states that a Warlock has the following:

  • 1 First-level spell slot at level 1.
  • 2 First-level spell slots at level 2.
  • 2 Second-level spell slots at level 3.

Does this mean that a third level Warlock has a cumulative 5 Spell Slots? (3 First-Level slots and 2 Second-Level slots)

Or do the new slots just replace old slots between levels such that a 3rd-level Warlock ultimately has only 2 second-level spell slots?

Does a Warlock receive the benefit of their familiar’s Magic Resistance trait?

The Warlock has access to special forms for their find familiar spell through the Pact of the Chain feature. I’m wondering if these special forms, the Quasit, Imp, and Pseudodragon in particular, allow the player character to share the familiar’s Magic Resistance feature. In the Monster Manual each of these creatures has a sidebar that states that the familiar shares its Magic Resistance feature with the companion they are bonded to, but the PHB doesn’t mention this in any of the creatures’ stat blocks.

For example, in the Variant: Pseudodragon Familiar sidebar on page 254 of the MM it says:

“While the pseudodragon is within 10 feet of its companion, the companion shares the pseudodragon’s Magic Resistance trait.”

This feature seems clear in the MM but I’m led to believe that it wasn’t intended for Player Characters since mention of it is absent from the stat blocks in Appendix D of the PHB (pages 307-309).

Would a 3rd level warlock who chose one of these familiar forms through the Pact of the Chain feature benefit from advantage from saving throws from spells and other magical effects due to these special forms, or was this feature only meant for powerful NPCs and enemy spellcasters who had made this link with these familiars themselves?

Are the Book of Shadow or Genie’s Vessel granted by Warlock features considered as magic items?

Basically the title.

If a Warlock fights by wielding their Book of Shadow or Genie Vessel in one hand as a spell focus and keeps the other one empty to meet the requirement of somatic component, they will eventually end up in situations where they are forced to use the book or vessel as an improvised weapon (like when an enemy closed the distance or when the Warlock needs to perform an Opportunity Attack). So the question is, would hitting someone with the spine of the book of shadow or their oil lamp of a Genie Vessel be considered using an improvised weapon with magical properties?

For the Vessel, It is a tiny object, but not specifically written as "a magical tiny object" even if the previous sentence mention that the patron has imbued magical powers with it. The Warlock can do lots of wacky stuff with it like sleeping in it or dragging others into it to rest, but it almost seems like its the power of the Class Feature using the item in question as the medium in which the feature’s power (and thus your Patron’s power) is expressed, and not the power of the Item proper.

Genie’s Vessel ; 1st-level Genie feature ; Your patron gifts you a magical vessel that grants you a measure of the genie’s power. The vessel is a Tiny object, and you can use it as a spellcasting focus for your warlock spells. You decide what the object is, or you can determine what it is randomly by rolling on the Genie’s Vessel table.

The book of shadow is even more vague; it is only stated to be a grimoire, and nothing else about it’s materalistic properties are mentioned or explained further other than that if its lost or destroyed you can resummon it. How durable is it, anyway?

This also opens some icky boxes like "Would anti-magic fields suppress their magical properties or destroy them outright?" and something like "If the Genie’s Vessel is indeed a magic item and using it as an improvised weapon can pierce resistance, the Genie Warlock has access to a magical weapon that is basically the equivalent of a +0 but magical dagger at LV1" etc.

I am aware that some similar questions have been asked, like "Does attacking with an improvised weapon using a magic item count as a magical attack?" and "Are punches with Gauntlets of Ogre Strength magical, improvised weapon attacks?"; but the main issue here is that the vessel’s status as a separate magical item seems to be a bit unclear.

PS: Before someone says that using it as an improvised weapon is a poor choice of tactics, keep in mind that Genie Warlocks gain extra damage from the "Genie’s Wrath" Feature equal to their proficiency bonus. Compared to wielding a regular dagger with the damage of 1d4 + dex + pb, using the Genie’s Vessel as an improvised weapon of 1d4 + str + pb isn’t that bad; and depending on how the DM would rule it could be counted as magical and be able to pierce resistances.

Does the UA warlock invocation Kiss of Mephistopheles require you to know the Fireball spell?

Unearthed Arcana: Revised Class Options includes an Eldritch Invocation option called Kiss of Mephistopheles:

Prerequisite: 5th level, the Fiend Patron, eldritch blast cantrip

You can channel the fires of Mephistopheles through your eldritch blast. When you hit a creature with that cantrip, you can cast fireball as a bonus action using a warlock spell slot. However, the spell must be centered on a creature you hit with eldritch blast.

The new UA allows the warlock to cast fireball as a bonus action — essentially building in the Sorlock in an invocation without requiring a multiclass into Sorcerer.

But the question is, do you actually need to know the fireball spell (as in, choose to have fireball take up one of your Spells Known) to be able to cast it this way?

How should my Warlock player use their familiar during battles?

One of my players has a Warlock character and is using Pact of the Chain for their Pact Boon. They most often cast a pseudodragon as their familiar, but neither of us are sure about how they should be using the pseudodragon during fights. Does the familiar get its own turn in the turn order? Or can the familiar only act when the Warlock gives up their action slot? I read the PHB content, but I’m still unclear how/if the pseudodragon should be used in fights.

Do I need to have the Gift to be a Wizard / Warlock etc?

The group is getting started (I’m the GM), and we’re confused – do you need to take the CP Advantage "the gift" in order to be a Mystic class? (Warlock/Wizard/Summoner etc)? It isn’t mentioned as a requirement, but it’s heavily implied by how the advantage is worded. Is it intended that these classes have a generic -2 Advantage point balance? Makes a huge difference in character generation – thanks in advance if anyone has any insight.

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.

Can a high level warlock with Book of Ancient Secrets learn ritual spells higher than 5th level?

Let’s say I’m an 11th level Pact of the Tome Warlock with Book of Ancient Secrets. I’m able to learn spells to cast as rituals from any source, I can transcribe spells up to half my level rounded up, and have just gotten my 6th level Mystic Arcanum.

I do not actually have 6th level slots, but ritual casting doesn’t use spell slots anyway, and I am capable of casting 6th level spells (or at least one). Am I able to transcribe a 6th level ritual spell, or am I capped at learning 5th level rituals?