The Cube (Patron)

Your patron is a mysterious entity that contacts you through an unusual charm. During your travels you have stumbled upon a dull metal cube. To the naked eye it is mundane, though It speaks to you telepathically and inexplicably bestows you with arcane abilities. Incomprehensible whispers flood the back of your mind. Occasional promises of great wealth and power in exchange for cooperation seep through the cacophony into your subconscious. It is possible to ignore the incessant whispers with focus, or distraction, but they are ever-present. Amongst the promises of power are also vague messages giving you the sense that this power is fleeting and that you must keep this trinket in your possession lest you become powerless. 

Expanded Spell List

The Cube 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.

The Cube Expanded Spells

With Great Power...

"...comes greater paranoia."

The Cube bestows it's wielder with powerful abilities as long as they remain connected to it.

While attuned to The Cube, you gain a bonus to your armor class equal to your charisma modifier instead of your dexterity modifier (Maximum +5).

If The Cube is removed from your possession and is attuned by another humanoid, all of your class features are disabled until you reclaim The Cube and attune it. If The Cube is merely removed from your possession you maintain usage of your class features unless your distance from The Cube exceeds 100 feet, or it is attuned to another humanoid.

(Note: For the time being, the AC bonus must be added manually every time your CHA modifier increases.)

Eldritch Gambler

"I'll make this one count, bet my life on it."

Starting at 1st level, once per turn when you make a melee weapon attack, or spell attack with the eldritch blast cantrip, you can choose to expend one use of this feature and one of your spell slots. If you do so the attack deals an additional 1d10 force damage for a first level spell slot, and increases by 1d10 for every spell slot level above first (Maximum 5d10). If that attack roll is less than 5 before modifiers are applied, you take the additional damage instead.

You can use this feature a number of times equal to your charisma modifier. All uses are restored on a long rest. You must declare usage of this feature before rolling to attack.

 The Cube (Item) features are replaced by this class feature while it is attuned

Loaded Dice

"Whaddya know? I rolled a seven again."

Starting at 6th level, you start to understand how to use the cube's power to enhance your luck. 

Once per short rest, when you make an attack roll and the outcome is 5 or less, you can use your reaction to treat the roll as if you had rolled the number equal to your charisma modifier plus your proficiency bonus instead. 

Tip the Scale

"I've got plenty of good luck to go around."

At 10th level, The Cube grants you the ability influence your allies' luck. When an allied creature within 20 feet of you makes a saving throw or ability check, you can use your reaction to add 1d6 + your charisma modifier to the roll. You can do this after knowing the result of the roll but before knowing the outcome.

You can use this feature a number of times equal to your proficiency bonus. All uses are restored on a long rest.

Spell Slot Machine

"No sevens.This one only goes up to 666"

Starting at 14th level, as an action you can roll 1d6. As part of this action, you can cast any spell that is the same level as the result as long as it is on the warlock spell list, even if you do not know the spell or have the material components. The spell is cast at 6th level. 

After using this feature, you cannot use it again for a number of long rests equivalent to half the spell's level rounded up (Minimum 1).