When Normal Summoned, this Level 3 Tuner allows you Special Summon a Level 2 or lower monster from your Graveyard. Thanks to What Grows in the Graveyard, you will begin the Duel with a copy of Dark Verger in your Graveyard, so Junk Synchron will instantly give you access to your Extra Deck without having to set up first.
Junk Synchron and Dark Verger can be used to Summon any of the Level 5 Synchros in your Extra Deck, but most of the times you will want to directly into Armades, Keeper of Boundaries.
When Armades, Keeper of Boundaries declares an attack, your opponent can’t activate cards or effects until the end of the Damage Step; cards like Wall of Disruption, Drowning Mirror Force and Sphere Kuriboh are essentially rendered useless by this Level 5 Synchro.
When Normal Summoned, Mystic Macrocarpa Seed will trigger Dark Verger’s effect from the Graveyard and allow you to Special Summon it to your side of the field in Attack Position. Now you have a Level 3 Tuner and a Level 2 non-Tuner, just like with Junk Synchron, but, due to the restriction that Mystic Macrocarpa Seed imposes, you will only be able to Special Summon an EARTH Level 5 Synchro from your Extra Deck.
Most of the times you will want to Summon Goyo Chaser because of its effect, but do keep in mind that Junk Warrior can benefit from having Paleozoic Canadia or Paleozoic Hallucigenia on your side of the field since they are Level 2 monsters; if you Summon Junk Warrior while you control Canadia or Hallucigenia, it will reach 3500 ATK, which is more than enough to get over Masked HERO Anki and Cosmo Brain.
A reason why I particularly like Enemy Controller in this deck is Spellbook of Fate: if your Dark Verger is banished as soon as it hits the field, you will get no value out of it and you won’t have access to your Extra Deck for the rest of the duel. You can chain Enemy Controller to Spellbook of Fate and Tribute Dark Verger.
As long as Dark Verger is in your Graveyard and you still have copies of Junk Synchron or Mystic Macrocarpa Seed in your hand or Deck, you will be able to retrieve it, so it’s the best card to use for your aggressive Enemy Controller plays.
Paleozoic Canadia needs no introduction at this point: it’s a great Trap Card, it can slow down the opponent and disrupt their plays.
Paleozoic Hallucigenia can halve the ATK and DEF of a face-up monster on the field, it can be used during the Damage Step to protect your monsters from an attack or even to allow them to get over an opponent’s monster.
Goyo Chaser synergizes very well with this card because of the fact that, unlike Mirror Wall, it can be used offensively. Just like Paleozoic Canadia, Paleozoic Hallucigenia can be Special Summoned from the Graveyard as a Level 2 monster with 1200 ATK.
Without this Skill this deck would obviously not function as intended, as there aren’t that many reliable ways of getting a Level 2 monster into the Graveyard for Junk Synchron.