So I wanted to kind of show off a fun deck that is very combo oriented.
https://i.imgur.com/Pn1UmNg.png Basically this deck abuses Phantom Fortress Enterblathnir. This is a rank 9 XYZ monster with 2900 ATK and 2500 DEF. It also requires 2 level 9 monsters as XYZ material. You can detach 1 material to gain 1 of the following Effects.
1. Banish 1 card your opponent controls.
2. Banish 1 card in your opponent's graveyard.
3. Banish 1 random card in your opponent's hand.
4. Banish the top card in your opponent's deck.
Now since this card does not target it makes this card even better. Before you ask "How would you consistently play it?" Simple this is what this post is about. First you normal summon 1 Mathematician. Use Mathematician's effect to send 1 monster to the graveyard. The monster you should always choose is Carboneddon.
Carboneddon is a level 3 Earth Dinosaur monster with 800 ATK and 600 DEF. I will not describe it's first effect as fire monsters are not relative to the current META. You can banish Carboneddon to special summon 1 level 7 or lower Normal Dragon monster from your deck, however you can only use that effect of Carboneddon once per turn.
The monster you special summon will be Labradorite Dragon. It is a Dark Dragon Tuner monster that is level 6, 0 ATK, 2400 DEF. From there you Synchro Summon with your mathematician to bring out XX-Saber Gottoms. From here you use XX-Saber Gottoms' effect to tribute itself into the graveyard to make your opponent discard.
Now for the sake of the best hand to make your opponent lose 4 cards before they start. From here you can use Soul Charge to bring back Gottoms, Mathematician, and Labradorite Dragon. Next you use Gottoms' effect again to make your opponent lose another card from their hand. 2/4 cards down, From Here you can Synchro Summon into Cloudcastle in defense position. It is a level 9 Wind Machine monster with 0 ATK and 3000 DEF with an effect to special summon 1 level 9 monster from your graveyard. Also any Level 8 or lower monsters can not declare an attack the turn they are normal summoned or special summoned. Next you Overlay the 2 level 9 monsters into Phantom Fortress Enterblathnir.
Detach Gottoms from Enterblathnir to make your opponent banish 1 card from their hand. So now 3/4, from here you can use Spell Striker's effect to banish 1 spell (Soul Charge) to special summon it. Then by activating Silver's Cry you can special summon your Labradorite Dragon. Then Synchro Summon with your Spell Striker and Labradorite Dragon into another Cloudcastle special summoning Gottoms. Then Overlay into another Enterblathnir, detach Gottoms then banish their 4th card from their hand. Sadly I can not push the combo further yet but if I do I will let you all know. At this time your opponent has only 1 card before they draw really hurting their resources.