>Ritual combo

Cards required - Displacer kitten, any card that returns instant/sorcery from graveyard to hand (e.g eternal witness), 2 rituals (e.g dark ritual and lotus petal).
Steps -

1. Play the first ritual
2. play the eternal witness card
3. play displacer kitten
4. play second ritual, displacer kitten triggers and your eternal witness returns the first ritual to your hand
5. play the ritual that got returned to your hand and displacer kitten blinks eternal witness to get the other ritual
   In the end you will get infinite mana

>Artifact bounce combo

Cards required - Displacer kitten, Teferi, any artifact that taps for more mana than it's mana cost (e.g sol ring)
Steps -

1. Play displacer kitten and Teferi
2. Play artifact and tap it for mana. Playing the artifact will trigger displacer kitten to bounce Teferi.
3. Actiate teferi's bounce ability to bounce the artifact
4. Repeat steps 2 and 3
   In the end you will get infinite mana

>Thigs to do with infinite mana

Once you have infinite mana, you can activate Thrasios's activated ability infinite times to draw your whole deck. Once you have walking ballista in your hand and infinite mana, you just win.

>Other cool things

Ravos works well with lots of cards because he can return things from your graveyard to your hand. Cards like mulldrifter and sakura-tribe elder are already good on their own, but playing them every turn is even better. He turns burried alive and entomb into tutors. Muldrotha can also be used in the same way (and in the ritual combo). Muldrotha can also be used with mulldrifter, sakura-tribe elder, any instant/sorcery, and lotus petal.

With so many ways to get stuff back from your graveyard and tutors, you do not need to worry about running out of cards like eternal witness. Whenever a necessary card is in your graveyard, you can just get it back. If your displacer kitten gets countered, just get it back. All of the instants and sorceries can be played multiple times. For example, you play teferi's protection, then you play Tamiyo and play it again next turn. Next turn you +1 Tamiyo and and play teferi's protection. Turn after that, you -3 Tamiyo and play teferi's protection for a third time. If you drew a card like eternal witness during those three turns that you were completely safe, you could return Tamiyo to your hand and do it again. You can do that sort of thing with any card though. What if you did it with rampant growth, demonic tutor to assemble a combo, void rend, or even cyclonic rift.

This deck has a lot of ramp, so you do not have to play every ramp card in your hand, most combos require 9 mana (including displacer kitten) and can be done over the course of multiple turns. There are two ways that you can play, stop ramping after you have just enough mana and do the combo, or ramp alot, maybe make a pillow fort, create a board presence, and win. Option 1 would be better against slower decks, because they would not win as early and you could just beat them before they can win. Option 2 if better for faster decks because this deck is not the fastest deck and it will be outspeeded.

>Edits for deck

If you see something that can be better in the deck, that is probebly because there is something that can be better. I am not perfect.