Resurrected - Rogue Subclass and Eldritch Invocations

You made a pact with the Undying God when you died for the first time. By the will of the Undying god you have been made immortal, the Undying Curse seemed like a blessing, until you learned its dark twist.

I WANTED A MAGICAL ROGUE THAT'S GOOD AND NOT BAD (LOOKING AT YOU, ARCANE TRICKSTER). THAT IS ALL.

This is loosely based on Paulcheeba's homebrew. Perfect for a certain undead rogue.

Like every rogue this is certainly good for a dip (you could definitely cross this with Warlock and be an Eldritch Blast cannon), but I hope it stands as a viable subclass as well.

Charisma is your spellcasting ability.

As of 3. 0 I have made some balance adjustments and structured its progression closer to Arcane Trickster.

You gain 1 level 1 Warlock spell slot at level 3, then 1 additional slot at levels 7, 13, and 19. You select 2 cantrips from the Warlock list at level 3, and 1 additional cantrip at level 10.

You learn a total of 3 cantrips and 13 spells.

At levels 3, 8, 14, and 20 you can choose a spell from the Warlock spell list. I have directed this to Hexblade. Otherwise you will select spells from the table below.

At levels 8, 14, and 20 you can replace a spell from the Hexblade spell list for another.

I: Charm Person, Disguise Self, False Life, Fog Cloud, Grease, Hex, Hunter's Mark, Jump, Longstrider, Sleep, Unseen Servant, Thunderwave

II: Darkness, Enhance Ability, Hold Person, Knock, Magic Weapon, Mirror Image, Misty Step, Pass Without Trace, Invisibility

III: Counterspell, Hypnotic Pattern, Sleet Storm, Vampiric Touch, Water Walk, Fly, Slow, Fear

IV: Arcane Eye, Banishment, Dimension Door, Phantasmal Killer, Greater Invisibility

The curse carries with it the capabilities of its last victim who was a warlock of great power. You gain limited pact magic and some Warlock features.

At the 3rd level, when you are reduced to 0 hit points, regain 1 hit point instead. You may use this feature once per long rest.

Additionally, you gain the Whispers of the Grave Invocation. It does not count against your known Invocations.

As part of your Cunning Action feature, once per turn you may cast cantrips and spells learned from Invocations as a bonus action.

At the 9th level, while you are Hiding, your targets have Disadvantage on Saving throws against your spells. Functionally the same as Magical Ambush.

At the 13th level, you can phase partially into the realm of the dead, becoming like a ghost. You may assume a spectral form for 10 turns. While in this form, you are Ethereal and considered hovering; you have a flying speed of 3m, and attacks have Disadvantage against you.

Your presence is fleeting like a whisper. At the 17th level, w