The Paladin table shows how many spell slots you have to cast your spells. To cast one of your paladin spells of 1st level or higher, you must expend a slot of the spell's level or higher. You regain all expended spell slots when you finish a long rest.

You prepare the list of paladin spells that are available for you to cast, choosing from the paladin spell list. When you do so, choose a number of paladin spells equal to your Charisma modifier + half your paladin level, rounded down (minimum of one spell). The spells must be of a level for which you have spell slots.

For example, if you are a 5th-level paladin, you have four 1st-level and two 2nd-level spell slots. With a Charisma of 14, your list of prepared spells can include four spells of 1st or 2nd level, in any combination. If you prepare the 1st-level spell Cure Wounds, you can cast it using a 1st-level or a 2nd-level slot. Casting the spell doesn't remove it from your list of prepared spells.

You can change your list of prepared spells when you finish a long rest. Preparing a new list of paladin spells requires time spent in prayer and meditation: at least 1 minute per spell level for each spell on your list.

Charisma is your spellcasting ability for your paladin spells, since their power derives from the strength of your convictions. You use your Charisma whenever a spell refers to your spellcasting ability. In addition, you use your Charisma modifier when setting the saving throw DC for a paladin spell you cast and when making an attack roll with one.

Spell save DC = 8 + your proficiency bonus + your Charisma modifier
Spell attack modifier = your proficiency bonus + your Charisma modifier

You can use a holy symbol as a spellcasting focus for your paladin spells.

Bless
Ceremony
Command
Compelled Duel
Cure Wounds
Detect Evil and Good
Detect Magic
Detect Poison and Disease
Divine Favor
Heroism
Protection from Evil and Good
Purify Food and Drink
Shield of Faith
Thunderous Smite
Wrathful Smite

Your arcane research and the magic bestowed on you by your patron have given you facility with spells.

Undead Patron Expanded Spell List:
1st: Bane, False Life
2nd: Blindness/Deafness, Phantasmal Force
3rd: Speak with Dead, Phantom Steed
4th: Death Ward, Greater Invisibility
5th: Antilife Shell, Cloudkill

You know two cantrips of your choice from the warlock spell list. You learn additional warlock cantrips of your choice at higher levels, as shown in the Cantrips Known column of the Warlock table.

Cantrips Known:
Green-Flame Blade
Eldritch Blast

The Warlock table shows how many spell slots you have. The table also shows what the level of those slots is; all of your spell slots are the same level. To cast one of your warlock spells of 1st level or higher, you must expend a spell slot. You regain all expended spell slots when you finish a short or long rest.

For example, when you are 5th level, you have two 3rd-level spell slots. To cast the 1st-level spell Witch Bolt, you must spend one of those slots, and you cast it as a 3rd-level spell.

Charisma is your spellcasting ability for your warlock spells, so you use your Charisma whenever a spell refers to your spellcasting ability. In addition, you use your Charisma modifier when setting the saving throw DC for a warlock spell you cast and when making an attack roll with one.

Spell save DC = 8 + your proficiency bonus + your Charisma modifier

Spell attack modifier = your proficiency bonus + your Charisma modifier

You can use an arcane focus as a spellcasting focus for your warlock spells.

At 1st level, you know two 1st-level spells of your choice from the warlock spell list.

The Spells Known column of the Warlock table shows when you learn more warlock spells of your choice of 1st level or higher. A spell you choose must be of a level no higher than what's shown in the table's Slot Level column for your level. When you reach 6th level, for example, you learn a new warlock spell, which can be 1st, 2nd, or 3rd level.

Additionally, when you gain a level in this class, you can choose one of the warlock spells you know and replace it with another spell from the warlock spell list, which also must be of a level for which you have spell slots.

Spells Known:
1st Level - Bane (Patron), False Life (Patron), Hex, Armor of Agathys