The Arch-Wyrm

Not all dragons hoard wealth in the common forms: gold, gems, or even art pieces. Some prefer to hoard their wealth in favors and deals brokered with mortals. You are one such mortal, who has agreed to serve as a dragon's agent in the world in exchange for a piece of its power.

Expanded Spell List

The Arch-Wyrm lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.
NOTE: Some spells granted by this subclass come from outside of the Basic Rules (marked here with an *). I cannot actually map these spells to this subclass and share it with the community, so if you're interested in using this, you might have to create homebrew items or feats that grant the specific spells. Everything else should work just fine.

Arch-Wyrm Expanded Spells

SPELL LEVEL	SPELLS
1st	absorb elements, chromatic orb*
2nd	dragon's breath*, gust of wind
3rd	elemental weapon*, protection from energy
4th	secret chest, private sanctum
5th	creation, legend lore

Draconic Patronage

At 1st level, you choose one type of dragon as your patron. Each dragon has an associated damage type that will be used by later features in this class. You also learn a cantrip of your choice from any spell list that deals damage of the type associated with your patron. It counts as a Warlock cantrip for you, but it doesn't count against your number of cantrips known.
NOTE: Some cantrips that should granted by this feature come from outside of the Basic Rules (such as Lightning Lure). I cannot actually map these spells to this subclass and share it with the community, so if you're interested in using this, you might have to create homebrew items or feats that grant the specific spells. Everything else should work just fine.

Dragon Patron

Dragon	Damage Type
Black, Copper	Acid
Blue, Bronze	Lightning
Brass, Gold, Red	Fire
Green	Poison
White, Silver	Cold

Black Dragon

You learn a cantrip of your choice that deals acid damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Blue Dragon

You learn a cantrip of your choice that deals lightning damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Brass Dragon

You learn a cantrip of your choice that deals fire damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Bronze Dragon

You learn a cantrip of your choice that deals lightning damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Copper Dragon

You learn a cantrip of your choice that deals acid damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Gold Dragon

You learn a cantrip of your choice that deals fire damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Green Dragon

You learn a cantrip of your choice that deals poison damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Red Dragon

You learn a cantrip of your choice that deals fire damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Silver Dragon

You learn a cantrip of your choice that deals cold damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

White Dragon

You learn a cantrip of your choice that deals cold damage from any spell list. It counts as a Warlock cantrip for you, though it does not count against the number of cantrips you know.

Emissary of Dragons

In making the pact with your dragon patron, you learned how to communicate with them. You learn to speak, read, and write draconic if you can't already.

In addition, your pact has provided you with increased knowledge of the affairs of your patron and their kind. Whenever you make an intelligence or wisdom check related to dragons, you have advantage on the check.

Protection of the Scale

Starting at 6th level, your patron protects you from their own elemental abilities. When you take damage of the type associated with your patron, you can use your reaction to gain resistance to that type of damage, including against the triggering damage, until the start of your next turn.

You can instead choose to gain immunity to that type of damage. You can use this ability a number of times equal to your proficiency bonus, and regain all expended uses when you complete a long rest.

Gift from the Hoard

Starting at 10th level, you have gained enough trust from your patron that they are willing to share their treasure hoard with you. Whenever you complete a long rest, you may request a gift from your draconic patron, such as a jewel, a weapon, or a magic item. If the requested item is a mundane item, it can have a gold cost up to 50 times your Warlock level. If it is a magic item, its rarity can be no higher than Uncommon. It is up to the DM whether your patron actually possesses the item you ask for, but if they do not, they will provide you with a similar item. If the item ever leaves your possession, unless it is consumed as a part of its function (such as a potion or spell component), it vanishes in a puff of smoke, and you cannot use this feature again until you complete 1d6+1 long rests, or until you complete a task given to you by your patron. The item also disappears if you use this feature to request a different item.

The value of the item you can request increases when you reach certain levels in this class. At 14th level, the value of a mundane item increases to 75 times your Warlock level and the maximum rarity magic item increases to Rare. At 18th level, the value of a mundane item increases to 100 times your Warlock level and the maximum rarity magic item increases to Very Rare.

Dragon Broodmaster

Your patron has lived long enough to have spawned a great number of offspring, which can be entreated to serve you in moments of need. Starting at 14th level, you may use an action to call upon your patron to send you aid in the form of Lesser Dragons of your patron's color. When you take this action, you can summon any number of these dragons, but you may only summon four in this way before you must take a long rest to use this feature again. The summoned dragons appear in unoccupied spaces of your choice within 60 feet of you. A dragon summoned in this way shares your initiative count, but takes its turn immediately after yours. It can move and use its reaction on its own, but the only action it takes on its turn is the dodge action, unless you take a bonus action on your turn to command it to take one of the actions in its stat block or the dash, disengage, help, hide, or search action (if you have multiple dragons summoned, you can issue commands to any or all of them, and they can be different commands). If you are incapacitated, the dragon acts on its own, focusing on protecting you and itself.

The dragons remain for 10 minutes before disappearing. If they die, their bodies dissipate into a substance suitable for their type (snow for a silver or white dragon, for instance).