The Shadowcat

Your patron, The Shadowcat is an otherworldly being and incarnation of fate itself, striding inbetween the planes in search of mortals with peculiar fates. It is a living omen of both fortune and misfortune alike, causing effects of weal and woe to its surroundings.

Drawn to mortals for mysterious reasons, The Shadowcat finds facination in beings of some extraordinary talent, ranging from martial prowess, musical talent, vivid imagination and the like. Though it is unclear what makes the shadowcat extend its paw to form a contract, it is believed that it does so in order to pave a path and make a neseccary change to shape of the destiny of its prey, a person the've found an interest in observing. 

It is unclear as to what the Shadowcat expects in return with its contract, though those involved with one have described a sense of being directed, toyed with and observed, almost as a cat that is playing with its prey, without the intent to kill, necessarily.

Expanded spell list

The Shadowcat 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.

Spell slot level:
1st: Feather fall, Jump
2nd: Augury, Blur
3rd: Slow, Revivify
4th: Divination, Greater Invisibility
5th: Mislead, Modify Memory

Claws of Shadow

At 1st level, servants of the Shadowcat prowl through the far planes around you, defending you from harm.

Whenever a creature you can see attacks you from within 60 feet, you can use your reaction to cause ethereal claws to lash out in retaliation. Make a melee spell attack roll. On a hit, the attacker takes slashing damage equal to your warlock level plus your Charisma modifier. If the target is slain, the attack against you fails. You can use this feature a number of times equal to your Charisma modifier and these uses recover whenever you finish a long rest.

The Dimcat

At 1st level, having the Shadowcat as your patron, you have been blessed with the ability to summon a minion of the Shadowcat, the Dimcat. 

You can cast the spell find familiar, only to summon the dimcat as your familiar.

Whenever the Dimcat is touching you, it shares its darkvision with you out to 120 feet.

 

The Dimcat's stats are the following:

Tiny fey, chaotic neutral

Armor Class 13 (natural armor)

Hit Points (2d4 + your warlock level)

Speed: 30 ft., climb: 30 ft.

STR 6 (-2) DEX 16 (+3) CON 10 (+0) INT 6 (-2) WIS 12 (+1) CHA 10 (+0)

Skills Perception +3, Stealth +4

Darkvision 120 ft., passive Perception 13

Challenge 0 (10 XP)

Shadow Hop: The dimcat can teleport to a point within 10 feet as an action. This is only available while it is in darkness.

Stolen luck

At 6th level, as a bonus action, you can devour the fortune of a target within 60 feet. The subject has disadvantage on their next attack roll, ability check, or saving throw. You gain advantage on your next attack roll, ability check, or saving throw. Once you use this feature, you can't use it again until you finish a short or long rest.

Umbral vault

At 10th level, whenever you are subject to an effect that requires you to make a Dexterity saving throw, you can use your reaction to instantly dissolve into a dark mist and reappear at an unoccupied location within 30 feet, avoiding the effect. You cannot use this feature again until you finish a short or long rest.

Call to the shadows

At 14th level, you can summon a servant of the Shadowcat into your realm, known as the Ink Lynx, within 30 feet of you as an action. The utterly black feline creature, acts under your command during its turn, just after your own.

The servant remains until it dies, you dismiss it, or one minute has passed. Once you summon the lynx, you cannot do so again until you finish a long rest, unless you use a spellslot to summon it again.

Ink lynx stats:

Large fey, Chaotic neutral

Armor Class 17 (natural armor)

Hit Points 65 (10d10+10)

Speed 45 ft., climb 45 ft.

STR 18 (+4) DEX 20 (+5) CON 12 (+1) INT 10 (+0) WIS 12 (+1) CHA 14 (+2)

Saving Throws Dex +8

Skills Stealth +8, Perception +6

Damage Resistances psychic; bludgeoning, piercing, and slashing from nonmagical attacks

Senses darkvision 120 ft., passive Perception 16

Languages can't speak, but understands commands

Challenge 5 (1,800 XP)

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Eyes of the Hunter. Magical darkness doesn't impede the lynx's darkvision.

Nightmare Hunter. Whenever the lynx succeeds on a saving throw, it can use a reaction to teleport up to 60 feet and make a single claw attack.

Shadow Dweller. The ink lynx can choose to generate an aura of magical darkness around itself as an action, as the darkness spell, except the area only fills a ten-foot cube centered on the lynx and moves with it. It can suppress this aura using a bonus action.

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Actions

Multiattack. The ink lynx makes two claw attacks and one bite attack.

Shadowed Pounce. The ink lynx teleports up to 60 feet and makes one bite attack.

Claw. Melee Weapon Attack: +8 to hit, reach 10ft., one target. Hit: 10 (1d10 + 5) slashing damage.

Bite. Melee Weapon Attack: +8 to hit, reach 5ft., one target. Hit 10 (1d10 + 5) piercing damage plus 7 (2d6) psychic damage.