BIRTHING POD LINES

The main goal of the deck is to assemble the combo Kiki-Jiki, Mirror Breaker + Felidar Guardian/Deceiver Exarch/Village Bell-Ringer and win through combat damage. To do so there are 4 ways:

Birthing Pod:

1- start with a CMC2 creature (if you want to start with a CMC1 creature, you'll need Corridor Monitor), sac the CMC2 and grab Deceiver Exarch and untap the pod
2- Reactivate the pod sacrificing the Exarch to tale Felidar Guardian and blink the pod.
3- Activate again the pod sacrificing the guardian to search for Karmic Guide and with her ETB target the guardian in the graveyard blinking again the pod
4- Sac again the guardian for Kiki-Jiki, Mirror Breaker, tap it to create a copy of Karmic guide to reanimate the Guardian (or the Exarch, it's your choice, or
even a Village Bell-Ringer if it's already in your graveyard) and with his ETB target Kiki. At this point all you have to do is to activate kiki targeting
Guardian or an untapping creature to create an infinite hasty army and kill everyone
All of this will cost 4G and 4 colorless, or 8 life (not a big deal with kenrith) and 4 colorless.

Neoform:

this is a tricky way to win since it will require more mana and colored one on top of it!
1- Start with CMC2 sac it with neoform and put Eternal Witness putting neoform on your hand
2- Sac the witness for Archaeomancer and put again neoform in your hand
3- Sac Archaeomancer for and Karmic Guide and reanimate the Archaeomancer targetting again neoform and putting it in your hand
4- At this point sac Archaeomancer for a Kiki-Jiki, Mirror Breaker and use his ability to copy Karmic Guide and reanimate the Eternal Witness targetting
again neoform and putting it in your hand
5- Sac the Eternal Witness for a Felidar Guardian and win the game with the kiki-felidar combo
This may be a backup way to enable the combo

Prime Speaker Vannifar:

The combo goes the same way of the birthing pod however you'll need two red mana (instead of 4 colorless and 8 life) to give haste to vannifar with Kenrith, the Returned King, otherwise it will take two turn to goes off. she needs haste when you cast her and after she got blinked by felidar. In this scenario vannifar is treated as a Birthing Pod. however, if you have rhythm of the wild in play, she enters the battlefield with riot, so you just need to give her haste and the combo turns into an even cheaper combo than the birthing one.

Shared Summons:

Otherwise if you have enough mana and Shared Summons in your hand use it to tutor Kiki-Jiki, Mirror Breaker + Deceiver Exarch / Village Bell-Ringer and win by hard cast.

This four were the Kiki combo ways to win. However, is quite easy to break them, since they require a lot of mana and/or steps. Thus, I’ve decided to put in other two ways to win:

SPLINTER TWIN COMBO

it speaks for itself. you'll just need Splinter Twin + Deceiver Exarch / Village Bell-Ringer. Since it is quite powerful, I’m thinking about to put in also
Heliod's Pilgrim as a cheap tutor for splinter twin or, alternatively, Freed from the Real, since both are quite efficient ways to win. moreover, if you manage to get the Splinter Twin + Village Bell-Ringer combo and have at least one mana dork you can also get infinite green or every color mana

INFINITE MANA COMBO

with infinite mana you easily win the game with Kenrith, milling your opponents or drawing your entire deck and starting the combo that you like the most. the ways to get infinite mana are:

Isochron Scepter + Dramatic Reversal + enough mana rock/dork--> it works because in the deck there are 14/13 between mana dorks and rocks. moreover, both isochron and dramatic are good on their own: with isochron you can imprint a removal or a counter, while with dramatic you can untap the pod or vannifar while combing with them

Freed from the Real / Vigean Graftmage + Incubation Druid--> infinite mana of every color

Freed from the Real / Vigean Graftmage + Faeburrow Elder--> infinite green and white mana: you can gain infinite life and make your creature infinitely big and then, by giving them haste and trample with kenrith, slay your opponents

NOTES:

I’m not sure if Tribute Mage fits in the deck or is better an Heliod's Pilgrim or whatsoever card in the sideboard. That said obviously this deck can be improved a lot, for example by focusing only on one or two combo, and not on so many at once, however this is just my preference, and since it is a budget deck without strong black tutors, I thought that was better to throw in there more combo that can synergize between them instead of using some slow and suboptimal tutors.
Concerning the mana base, it works quite well. You'll often have all the colors that you need, the same goes for the removal and counter, you'll just have to be parsimonious when using them. the rest, as card draw and graveyard recursion, will be mainly done by Kenrith, the Returned King wich help to keep the pod combo running in case a creature gets destroyed or will draw card to search for combo pieces.

Since English isn’t my first language, please excuse any mistakes and please bear with them