Arcanum Pact - Warlock Patron

The Arcanum Pact - Ulus, God of Arcane & Magic bestows upon those who dare to delve deep into the arcane arts. Drawing power from the fundamental arcane symbols that form the bedrock of all magic, warlocks of this pact are unparalleled in their understanding and manipulation of magic. The Arcanum Pact does not bind its warlocks directly to Ulus. Instead, it connects them to an ancient manifestation of Ulus's power, an avatar of arcane might, or perhaps a trusted emissary chosen by Ulus. Those who seek to form a bond with Ulus often find themselves in service to one of his religions, whether it be the Angshire Spirits, the Path of Ulus, Ulus Beliefs, or even the controversial Ulusian Heresy. Regardless of their chosen path, all who follow Ulus harness an arcane might that is both envied and feared.   To be a servant of Ulus is to be an eternal student of the arcane. These warlocks are equipped with an enchanted quill, a spell focus that aids in inscribing the perfect arcane symbols, augmenting their casting prowess. With an innate ability to recover their magical energies and an intuition that rivals even the most learned mages, they stand as a testament to Ulus's arcane mastery.  

Expanded Spell List

The Arcanum Pact lets you choose from an expanded list of spells when you learn a warlock spell.  

1st Level

Shield, Wrathful Smite

2nd Level

Blur, Phantasmal Force

3rd Level

Fireball, Call Lightning

4th Level

Greater Invisibility, Phantasmal Killer

5th Level

Flame Strike, Cone of Cold  

Spell Focus

Starting at 1st level, you possess an enchanted quill. This quill serves as a spellcasting focus for your warlock spells. When you use this quill to cast a spell, you gain a +1 bonus to spell attack rolls.  

Arcane Recovery

Beginning at 6th level, once per long rest, you can use an action to recover one expended spell slot.  

Arcane Echoes

At 10th level, Ulus's bond lets you tap into nearby arcane resonances. As an action:   Activate this feature and roll a d4. For 1 minute, if a creature within 60 feet casts a spell of a level ≤ your highest warlock slot + d4 result, as a reaction:

Echo the spell on your next turn without using a spell slot.

The echoed spell doesn't need to be in your known list and requires no materials, even if your hands are occupied.

Attempting to echo a too-powerful spell fails, but Arcane Echoes' duration continues.

If unused within a minute, the echo fades.

You must finish a short rest before using Arcane Echoes again.  

Ulus's Arcane Dominion

At 14th level, your connection with Ulus lets you bend magic to your will. As an action:   Choose a point within 60 feet, creating a 20-foot-radius Arcane Dominion there for 1 minute. Within this sphere, when a creature casts a spell of 4th level or lower, you can:

Cancel it, making it have no effect.

Redirect it to a new target or location within the Dominion.

Amplify it, giving disadvantage on saving throws against it or advantage on its attack rolls.

You must finish a short rest before using Ulus's Arcane Dominion again.  

Additional Invocations

Arcane Adept

Prerequisite: Arcanum Pact patron
You can learn one wizard spell of your choice and cast it as a warlock spell.  

Arcane Pulse

Prerequisite: Eldritch Blast cantrip, Arcanum Pact patron
When you cast Eldritch Blast, you can choose to weave the raw energies of the arcane through it. When you hit a creature with Eldritch Blast, they are surrounded by a faint shimmer. Until the end of your next turn, they cannot benefit from being invisible, and you can see them even if they are in total darkness.