Folks this deck has actually surprised me with how often it's able to win. I'm sorry for the long text but this is just one combo you can do and the deck has dozens! Let me know if a more in depth guide is wanted, I really think this deck has potential to be a solid option.
There are many lines but your full max power combo is, Ostinato send Sonata and Soprano (even if both Sopranos are in hand Ostinato allows you to use cards from hand), fusion summon Bacha, Effect of Bacha to summon Refrain (zone placement matters in this deck as our link Bloom requires her bottom left and bottom right zones be empty to work so place Bacha and Refrain right underneath the Extra Monster Zones and then other Special Summons away from whatever zones you will use for Bloom, anyway), Effect of Refrain to add Couplet, Effect of Couplet when added to hand to special summon Soprano in the far left or far right zone, Effect of Soprano to add Sonata to hand, Couplet in pendelum zone, Effect of Couplet to add Concerto, special summon Sonata, Link Refrain and Sonata into Bloom (place her where she has 2 available zones to summon to), Effect of Bloom discarding any card that is not the Concerto we added, special summon Aria and Elegy, Activate Concerto using Bacha Couplet and Bloom as materials to fusion summon Etoile, Chain Link 1 Bacha to special summon Sonata CL2 and CL3 Refrain and Couplet, Effect of Soprano to fusion summon Schuberta, Effect of Concerto to draw a card.
Okay so what do we have? We can not be targeted, can not be destroyed by battle, can not be destroyed by card effects, we can spin 3 cards from either grave as a quick effect, we have spin back up to 4 cards to our opponents hand as a quick effect and we have 5 other cards in our hand.
To a lot of decks, this is a complete blowout as they have no way of clearing our board. To some other decks, they need to summon Zeus to send our cards to grave which we can spin back their XYZs before they can even do it. TY-PHON also allows them to remove one card from our field non targetting which we can also just spin back before they can activate the effect. Dragite can also do it if it reveals a bunch of rocks but yet again we can spin it back before it even activates. The board is essentially a wall that tells your opponent we are going to turn 3 whether you like it or not (unless they Super Poly which then yikes we got a game on our hands)
Anyway that's it! I hope you enjoyed and try out the deck. Again let me know if you want more combo lines or just discussions on different match ups or an in depth look at ratios and cards included. Thanks for checking out my list!
-JinxMyLux