This is based on the 2018 Treasure Panda Exodia FTK by Daniel Ramirez made with adjustments for forbidden list changes since then. Shoutout to AznEyesWhiteDragon on YouTube for posting the decklist.
Optimal Combo:
1) summoner monk -> special summon treasure panda from deck.
2) Use whatever spells you have in hand that are able to be activated to put at least 3 spells in the GY.
3) Treasure Panda -> banish any ONE random spell (besides Primal Seed) to special summon Flamvell Guard.
4) Synchro summon using Flamvell Guard and Summoner Monk into T.G. Hyper Librarian.
5) Use Treasure Panda's effect twice more to get an Exodia piece and Flamvell Guard or Water Spirit.
6) Synchro Summon using that Exodia piece and Flamvell Guard or Water Spirit into Formula Synchron.
7) Use the effects of T.G. Hyper Librarian and Formula Synchron to draw a card from each card's effect.
8) Repeat steps 5-7 until Treasure Panda's effect can't be used anymore.
You should have T.G. Hyper Librarian, Formula Synchron, Treasure Panda, and a second Formula Synchron.
9) Synchro summon using Treasure Panda and one of the Formula Synchrons into Stardust Charge Warrior.
10) Use T.G. Hyper Librarian and Stardust Charge Warrior's effects to draw a card.
From here, the combo can branch out into multiple routes depending on what other cards were in your starting hand. BUT, every route you attempt from Step 10 MUST end with all of these conditions fulfilled;
All 4 normal monster pieces of Exodia must be banished (the most optimal way to get this requirement is by using Soul Release on every Exodia piece in the GY)
At least 2 copies of Primal Seed must be in your hand (the most optimal way to get this requirement is by draw power)
Black Luster Soldier - Envoy of the Beginning must be in one of your monster zones. (you must do step 9 before completing this requirement)
The head of Exodia must be in your hand. (complete this requirement with draw power)
11) Use Primal Seed to bring back two of the banished Exodia pieces.
12) Repeat Step 11.
If you have done it right, you will have won on the first turn of the duel. Good luck to you all and Long Live Exodia!!!!