I'm sure this is a version of a million decks that are/were out there, but I saw a version of it on Strictly Better MTG...
Pretty much the entire deck is value creature that synergize with Bontu's Monument.
Noted Strengths:
The deck really doesnt have anything in the meta to be scared about, even before Sideboards you have potential answers to:
Agro:
(Fatal Push, Cast Down) and the monument helps stabilize you if you can make it to T4.
Midrange:
Creature based removal card: Ravenous Chupecabra, Gifted Aetherborn; combined with the spell based removal package keeps you alive, monument and recurring Oathsworn Vampire.
Control:
Kitesail Freebooter, does yeomen's work, but it you are able to get a monument going you can cast 2 spells a turn which puts pressure on thier counter's and mana and forces decisions.
Weaknesses
So far weakness are to Enchantment Based Exile effects e.g. Seal Away can slow down or eliminate your recursion.
Abrade and other Artifact removal is also a pain in the butt, but having 4 copies of the monument is important.
I've been running a version in MTG Arena and it feels nice against the Meta (Red Agro and UW Control).
Things I'm thinking about:
The ideal Main Deck/Sideboard mix. I feel like all the cards to play are in the list, but where is the right mix looking at MTGA Competitive Constructed).
Lands and Mana... go all in on the Cabal Stronghold and play only swamps, or look for another land mix with some utility.
Happy to hear folks thoughts, links and other ideas for improvement.