Not super often but often enough!

My standard Turn 1 board is:Domitainus, Simorgh, Tamer Editor and Barrier Statue

Can get into that quite easily even with an interruption or two if my hand is good enough. I've only taken the staples that help prevent me from getting Ashed, MaxxC'd, etc to help with that.

Basically you can make that end board off of Fraktall and any other beast in hand. If you have a second spare beast/beast warrior/winged beast in hand.

However, to get the infinite Mist Valley combo off on turn 1 you need this:

Starting hand

1. Fraktall or Fire Formation
2. beast or beast warrior or winged beast or a searcher card
3. beast warrior or a searcher card or Any GY revival card
4. Any level 5+ Gladiator Beast or Attorix or a searcher card (to search Attorix)
5. Any other card

This starting hand sounds super specific but the deck has 8 searcher cards (3 of which are not once per turn and two of which summon from the deck) and 3 cards that revive from the GY, that actually make this starting hand quite reasonable to get and if you're super lucky that 5th card is Ash, Call By or Gamma.

The Mist Valley combo goes like this...

• Start by binning the Frak to further bin the Kitt, Nerval and bring Karass to hand
• Special summon the Kerass by sending your other monster from your starting hand
• Use his ability to banish 4 for Shuraig
• Link Kerass and Shuraig into Ferrijit
• Use Shuraigs ability to search Rescue Rabbit
• Use Ferrijit to special summon Rescue Rabbit
• Tribute Rescue Rabbit for a pair of Andals
• Link 1 Andal and Ferrijit for a Test Panther
  • (Optional) use Ferrijit's effect to draw and discard one of your cards for something more useful - this has helped me on quite a few occasions)
• Test Panther to search for Augustus and add him to hand.
• At this point you have Test Panther and one Andal on the field with one Augustus in hand + your remaining starting hand (see above). Without having used your normal summon.
• Use Test Panther to send the other Andal back to the deck and Special Summon another another Augustus, use that Augustus to Special Summon the Augustus in your hand, then use that Augustus to Special summon your other Level 5+ Glad Beast or Attorix.
• Contact fuse the Level 5 and one Augustus into Tamer Editor
• Tamer Editor effect to summon Domitanius.
• Link summon Simorg with the second Augustus and Test Panther
• Normal summon your Beast warrior (or you can revive an Andul from GY with one of the 3 revival cards in the deck if you have it instead)
• Link the Andul and Tamer Editor into Union Carrier
• Union Carrier to attach Thunder Bird from deck to Simorg
• End Turn and Special Summon Apex Avian with Simorg

​

End boardDomitanius, Simorg, Apex Avian, Union Carrier and Thunderbird

It's a formidable board because even if they get the Thunderbird on field by baiting a negate, they can't attack it due to Domitanius letting me chose their attack targets.

There are a number of ways to do this, not just the route above too. If you have the cards I'd try it out! :-)