Indeed, It is [Demon]/Necro/Finesse. I think Dreamfire or Zhavier coined the name for the deck when I was playing it and finding a lot of tournament success. It has a lot of different win conditions, the easiest being Graveyard + Finesse Tech 2. Combined with Garth to fetch a Grounded Guide or Maestro, buffed / free fencers from Graveyard and Dark Pact to bring Star-Crossed Starlet to join is very oppressive. You can also run usual Demon or Necro gameplans (Metamorphosis, Gargoyles + two-step, Zarramonde, Lich’s Bargain + Bone Collectors, etc), and some crazy T0 Vandy + River shenanigans (Dark Pact + Harmony + Discord / Two Step early on is nasssty)
Main weakness of the deck is no upgrade removal.
The only other decks people have an alternative name for, AFAIK, are:
420 Blazeit - This refers to a [White]/Peace/Finesse deck that has a gimmick infinite combo. You run Peace Tech2, and work towards getting 2x Drill Sergeant + Maxband River, then getting Smoker in hand. River plays smoker for free, and one of the DS can target Smoker with a buff rune to send it back to hand. Thus, infinite +1/1 runes for units. Usually Strength is the White choice, for Birds Nest
Miracle Grow - what I started calling Anarchy/Strength/Growth. Main win condition is Might of Leaf and Claw, activated by Zane, Surprise Attack, and just red starter deck stuff in general (not to mention Birds from Bird’s Nest). Also operates well on Blooming Ancients, Strength T2 + Arg buffs, or Anarchy T3, in case the opponent doesn’t have upgrade removal (many decks don’t!)