The LeShay Patron

  These enigmatic beings' origins are lost to the mists of time- many say that they are the sole survivors of a destroyed multiverse, others that they are the original primordials whose basic essence formed the planes known now as the Feywild and the Shadowfell.

 In the Realms, these beings were known only to the most erudite of scholars... until the coming of Sarifal. When the city of Karador rose, fully formed from the icy waters of the Myrloch, the inhabitants of the Isle of Gwynedd were filled with awe- a sense which was quickly replaced by terror when implacable regiments of Eladrin Knights marched from the gates of that city, driving all not of fey blood from the isle and claiming it as the sovereign nation of Sarifal, under the rulership of it's LeShay rulers, the foremost of whom is High Lady Ordalf. Soon the fey made it known that they had inhabited the island before the coming of humans, some 12,000 years prior- and that Ordalf had shifted the entirety of her Court to the Feywild in order to avoid the humans that came to settle their lands. Now they have returned, for reasons known only to their enigmatic and reclusive ruler, and brook no challenges to their power in the lands which have been theirs since before humans discovered fire. 

Wisdom of Regret

Beginning at 1st level, you gain the ability to call upon the bottomless well of knowledge which your patron has accumulated over the millennia. At the end of each short rest you may choose any one skill with which you are not proficient- you gain proficiency with that skill until the end of your next long rest. Additionally, you become fluent in the Sylvan language, the native tongue of those ruled by the LeShay

Longing for the Lost

Upon selecting the LeShay Patron, you are infused with a fraction of the endless longing for the loss of a world long-gone; the power of this breaks many would-be warlocks, but those whose minds survive intact gain the power to endure that which is beyond endurance. 

Once per day when you fail a saving throw, you may re-roll that save with advantage on your second attempt. 

Elusive Enigma

Starting at 6th level, when you are the sole target of a spell, you can use your reaction to redirect that spell to a creature of your choice within range of the original spell. Once you use this feature you cannot use it again until you finish a long rest.

Arcana of the Ageless

Beginning at 10th level, you gain two separate but related benefits- first is that whichever skill you choose as the skill to benefit from the Wisdom of Regret Patron feature, you now have advantage on all rolls of that skill. Second, when you gain the Mystic Arcanum class feature at 11th, 13th and 15th levels, you may select these spells from the Cleric and Wizard spell lists in addition to the Warlock spell list, as the LeShay have access to magics associated with all manner of traditions, many of which they are said to have originated. For you, these spells are Warlock spells. The Mystic Arcanum chosen at 17th level is chosen solely from the Warlock list, as per the class rules as written. 

Arcana of the Ageless (13th level)

Beginning at 10th level, you gain two separate but related benefits- first is that whichever skill you choose as the skill to benefit from the Wisdom of Regret Patron feature, you now have advantage on all rolls of that skill. Second, when you gain the Mystic Arcanum class feature at 11th, 13th and 15th levels, you may select these spells from the Cleric and Wizard spell lists in addition to the Warlock spell list, as the LeShay have access to magics associated with all manner of traditions, many of which they are said to have originated. For you, these spells are Warlock spells.

Mystic Arcanum Expanded selection

LeShay patron Warlocks may choose spells from Cleric and Wizard spell lists in addition to the Warlock list when learning Mystic arcana

Dreams of ten thousand millennia

You expose a single target to the yawning gulf of time, full to the brim with the loss of everything that goes with it, which your patron has endured. The subject feels as though they have lived that entire period in utter isolation, although the effect is instantaneous- The target must make a Charisma save against your Warlock Spell DC or take 10d10 psychic damage (taking half on a successful save) and (if they fail that save yet survive the damage) make a CON save or take 2 levels of exhaustion. You may not use this feature again until you have completed a long rest.