http://www.pokebeach.com/2018/01/ultra-necrozma-gx-from-sm6-forbidden-light
It's not a game-breaking card, but I don't think players are taking it seriously, or respect it's damage output for a single discard, especially in Standard where the meta is mostly based around 2HKO decks and slower, less consistent OHKO'ers, which are generally Stage 2 decks.
As for it's main attack, Photon Geyser does 20 plus 80 for every attached basic Psychic Energy discarded. You can attach a Metal or a Unit Energy LPM for that part of the attack requirement and use Max Elixir for the Psychics. With one Psychic you have 100. With Choice Band that becomes 130, and with Devoured Field 140. If you used Beast Energy Prism Star it hits a nice 170. You're unlikely to hit that big number as early as this attack can be used as you only have one Beast Energy, but it makes for a respectable boost when you finally do attach it.
Getting the first turn attack obviously isn't practical, but a Float Stone or Guzma can help switch your active, and if you choose to add Mew FCO it's free retreat can help if it ends up active, and it can copy Photon Geyser if you decide to attach to it.
Acceleration is where it gets tricky, although it isn't too bad; you have Lunala Prism Star as your best option, with Rayquaza GUR or Shining Mew as the main acceleration. Shining Mew isn't too bad a choice as some may choose to take the easy prize on it rather than drag up the actual threat.
Theory-wise, this card should function better than the other OHKO decks in Standard (Vika/Bulu, Metal variants, possibly Gardevoir) because you don't have to devote space and deal with the inherent inconsistency of evolution lines, which leaves room for extra disruption or deck thinning cards that those decks can't fit. The other popular meta decks, such as Zoroark and Buzzwole can't hit Ultra Necrozma for OHKO numbers (at least not consistently) which gives it time to set up in their faces, though they have more lenient Energy costs on the reverse side.
Expanded adds a few options: Battle Compressor helps to put Energies in the discard for later acceleration, Hydreigon EX gives UN free retreat while a Stadium is in play, and a few Hypnotoxic Lasers can be added for a bit more damage.
I don't see this as being a top-tier deck, of course, and I know it's bit early to mention this with SM6 only having a couple of cards revealed, but I don't think it's nearly as bad as some players think and they should keep it in mind going forward.
It's not a game-breaking card, but I don't think players are taking it seriously, or respect it's damage output for a single discard, especially in Standard where the meta is mostly based around 2HKO decks and slower, less consistent OHKO'ers, which are generally Stage 2 decks.
As for it's main attack, Photon Geyser does 20 plus 80 for every attached basic Psychic Energy discarded. You can attach a Metal or a Unit Energy LPM for that part of the attack requirement and use Max Elixir for the Psychics. With one Psychic you have 100. With Choice Band that becomes 130, and with Devoured Field 140. If you used Beast Energy Prism Star it hits a nice 170. You're unlikely to hit that big number as early as this attack can be used as you only have one Beast Energy, but it makes for a respectable boost when you finally do attach it.
Getting the first turn attack obviously isn't practical, but a Float Stone or Guzma can help switch your active, and if you choose to add Mew FCO it's free retreat can help if it ends up active, and it can copy Photon Geyser if you decide to attach to it.
Acceleration is where it gets tricky, although it isn't too bad; you have Lunala Prism Star as your best option, with Rayquaza GUR or Shining Mew as the main acceleration. Shining Mew isn't too bad a choice as some may choose to take the easy prize on it rather than drag up the actual threat.
Theory-wise, this card should function better than the other OHKO decks in Standard (Vika/Bulu, Metal variants, possibly Gardevoir) because you don't have to devote space and deal with the inherent inconsistency of evolution lines, which leaves room for extra disruption or deck thinning cards that those decks can't fit. The other popular meta decks, such as Zoroark and Buzzwole can't hit Ultra Necrozma for OHKO numbers (at least not consistently) which gives it time to set up in their faces, though they have more lenient Energy costs on the reverse side.
Expanded adds a few options: Battle Compressor helps to put Energies in the discard for later acceleration, Hydreigon EX gives UN free retreat while a Stadium is in play, and a few Hypnotoxic Lasers can be added for a bit more damage.
I don't see this as being a top-tier deck, of course, and I know it's bit early to mention this with SM6 only having a couple of cards revealed, but I don't think it's nearly as bad as some players think and they should keep it in mind going forward.
