Into the Void allows you draw a card, which means it automatically replaces itself in your hand. However, you can only activate this Spell Card if you have 3 or more cards in your hand and, if you do activate it, you are forced to discard your entire hand during the End Phase.
Unexpected Dai allows you to Special Summon a Level 4 or lower Normal Monster directly from your Deck. Use this Spell Card to Special Summon the Right Arm, Left Arm, Right Leg or Left Leg of the Forbidden One from your Deck and then either send them to the Graveyard via White Elephant’s Gift or Wonder Wand to draw 2 cards or Tribute them to Special Summon The Legendary Exodia Incarnate.
By banishing up two three Spell/Trap Cards from your Graveyard face-down, Treasure Panda allows you to Special Summon a Normal Monster from your Deck whose Level is equal to the number of cards you banished.
Thanks to Unexpected Dai, Into the Void, White Elephant's Gift and Wonder Wand, it's quite easy to get enough cards to banish into your Graveyard to Special Summon multiple pieces of Exodia. Keep in mind that you can activate Treasure Panda's effect how many times you want during the same turn.
Use the monsters Special Summoned by Treasure Panda’s effect to activate White Elephant's Gift and Wonder Wand and then Tribute the last one to Special Summon The Legendary Exodia Incarnate.
The Legendary Exodia Incarnate is a Level 10 monster that is unaffected by other cards’ effects, which means that your opponent cannot destroy it with Treacherous Trap Hole, take control of it with Enemy Controller or switch it into Defense Position with Sphere Kuriboh.
The Legendary Exodia Incarnate can only be Special Summoned by Tributing 1 “Forbidden One” monster, an archetype that consists of the Right Arm, Left Arm, Right Leg and Left Leg of the Forbidden One (Exodia the Forbidden One is not part of the archetype), all of which are Level 1 Normal Monsters that can be Special Summoned directly from the Deck via Unexpected Dai and Treasure Panda.
For each “Forbidden One” monster in your Graveyard, The Legendary Exodia Incarnate gains 1000 ATK, which means that this Level 10 monster is able to reach up to 4000 ATK. However, once per turn, during your End Phase, The Legendary Exodia Incarnate will force you to add 1 “Forbidden One” monster from your Graveyard to your hand, losing 1000 ATK.
If your opponent destroys The Legendary Exodia Incarnate by battle, it will allow you to reveal any number of “Forbidden One” monsters from your hand and draw an equal number of cards from your Deck, likely ending the game.
Since “?” is not a definite number, Sangan’s effect cannot be used add The Legendary Exodia Incarnate from the Deck to the hand.
The Legendary Exodia Incarnate is unaffected by other card effects, but it can still be targeted.
The Legendary Exodia Incarnate is unaffected by Necrovalley’s effect, which means that, even if the Field Spell is face-up on either side of the field, you will still have to add a “Forbidden One” monster from your Graveyard to your hand during your End Phase, if there are any.
The Legendary Exodia Incarnate can be equipped with Power of the Guardians. Spell Counters will still be placed on The Legendary Exodia Incarnate, but its ATK will not be increased. Power of the Guardians can be used to prevent The Legendary Exodia Incarnate from being destroyed by battle.
Since the Right Arm, Left Arm, Right Leg, Left Leg of the Forbidden One and Exodia the Forbidden One are not available yet, this is currently the only Skill you can play this deck with.