Synchron Graveyard Lock

I know graveyard hate isn't as relevant anymore in the TCG but hey, we still can build a fun Synchron deck with great combos.

Thing about this deck is that sometimes you can't always go full combo, but still get a decent board (assuming they don't use Effect Veiler on Speeder).

Main Combo

For the main combo, you always want to bring out Junk Speeder, your main extender for your plays and basically the main thing that gets this deck going. No Speeder, no 10 hours of chants.

Usually, to go into Speeder, you'll probably be using Junk Synchron and any Level 2 non-Tuner extender in the Deck. Caligo Claw Crow is a great extender which lets you easily setup for a Level 5 Synchro once you have Junk Synchron, and Junk Converter searches Junk Synchron and is an excellent 2-card combo (you also need a Tuner, but we run plenty of Tuners) that sets everything up (as long as you don't have to face Imperm). Junk Synchron also can be searched by 10 cards in the entire deck, which just goes to show how necessary it is for your combos.

Speeder aside, let's get into the real combos!

1. Synchro Summon Junk Speeder.
2. Activate Speeder's effect, Special Summoning 5 Synchron monsters (with different Levels) straight from the Deck (with surprisingly no cost other than just a Synchro lock, but still insane).
3. Activate Stardust Synchron's effect to search for Arrive in Light.
4. Synchro Summon Stardust Charge Warrior using Speeder and Jet Synchron (or Cyberse if you got really unlucky with your hand). You can also just draw 1 card from its effect.
5. Activate Arrive in Light and put Converging Wills Dragon on top of the deck.
6. Synchro Summon Crystal Wing Synchro Dragon using your Level 2 Tuner and Stardust Charge Warrior.
7. Use Arrive in Light's effect, drawing 1 card.
8. Activate Converging Wills Dragon's effect, Special Summoning it and Omni Dragon Brotaur from your Deck.
9. Activate Omni Dragon Brotaur's effect (if you do not have Doppelwarrior in your hand), targeting Junk Synchron and searching for Doppelwarrior.
10. Synchro Summon Garden Rose Maiden using Stardust Synchron and Omni Dragon Brotaur, then search Black Garden with it.
11. Synchro Summon PSY-Framelord Omega using Junk Synchron and Garden Rose Maiden.
12. Tribute Wheel Synchron to Special Summon Stardust Synchron from your GY.
13. Activate Doppelwarrior's effect in the hand, Special Summoning it.
14. Synchro Summon Shooting Majestic Star Dragon using Converging Wills, Crystal Wing, and Doppelwarrior.
15. Activate Doppelwarrior's effect in the GY to Special Summon 2 Level 1 Doppel Tokens.
16. Synchro Summon Accel Synchron using Stardust Synchron and one of your Tokens.
17. Special Summon Jet Synchron from your GY by sending one card from your hand to the GY (avoid sending any Tuners or Black Garden, we'll need those for later).
18. Synchro Summon Celestial Double Star Shaman.
19. Activate Celestial Double Star Shaman's effect to Special Summon back Doppelwarrior and any other Level 2 non-Tuner monster from your GY.
20. Synchro Summon Flower Cardian Moonflowerviewing using Double Star Shaman, Doppelwarrior, and your other Level 2 extender.
21. Activate Doppelwarrior's effect in the GY, Special Summoning 2 tokens.
22. Activate Black Garden.
23. Activate Moonflowerviewing's effect (if you want that extra draw, sometimes you might need it just to get 1 Tuner, you'll see why later). Then, after that, Synchro Summon Flower Cardian Boardefly using Moonflowerviewing and the 2 tokens.
24. Use Black Garden's effect (this is mandatory, it'll halve the ATK and Special Summon a Rose Token) and chain Arrive in Light to it.
25. Special Summon any Tuner from your hand with Arrive in Light (hopefully it was a Level 2 or Cyberse Synchron, some really funny things we can do with it by just summoning Baronne de Fleur with PSY-Framelord Omega if you really want to be a little wild)
26. Use Black Garden's mandatory effect again.
27. Activate Boardefly's effect, banishing Moonflowerviewing to lock your opponent out of the GY.
28. Activate Black Garden's optional effect to destroy the Rose Tokens and then Special Summon Garden Rose Maiden.
29. Activate Wheel Synchron's effect in the GY, and pick either Boardefly, Garden Rose Maiden, or Accel Synchron, and lower its Level by 4.
30. Synchro Summon Shooting Quasar Dragon.

So, the main combo sounds pretty complicated. However, with enough practice, you can get it right.

What if I want to play the deck right now?

In Master Duel, GY hate is definitely necessary even though Tearlaments are the worst archetype ever printed (us meta sheeps play Ojamas, get your casual Tear cards out of here and play Tier 0 Ojamas), so all you have to do is replace a few cards:
Wheel Synchron can be replaced with Stardust Synchron and Quickdraw Synchron (you need Stardust Synchron to be sent from Deck to GY in order to lower the Level to 1 and make Shooting Quasar), and replace On Your Mark, Get Set, DUEL! with just any hand traps or staples.

That's all, and have fun shouting Synchro chants at Locals!