oathbreaker // Signature spell
Kiora, Behemoth Beckoner // Prosperity
The basics to this deck are in one of two strategies - group hug and defender mill.
A very well known strategy in Commander. It appears innocent in providing advantages to all players in the form of mana ramp, card draw, etc. This deck plays the popular card drawing engines like Howling Mine, Rites of Flourishing, and Dictate of Kruphix. Collective Voyage and Minds Aglow are two cards that allow players at the table to contribute to the cause. You will draw a lot of cards and have a lot of mana, which is a great thing for the other strategy in this deck.
Defenders provide us with necessary protection against aggro decks while also playing into a second key strategy. Axebane Guardian and Overgrown Battlement generate mana for each creature with defender. This allows us to draw more cards with our signature spell, cast more creatures with defender, and repeat. Because the entire table is drawing cards, you can proceed to have every player draw large amounts of their deck at a time, which can lead to milling out each of your opponents. Additionally, Doorkeeper allows us to target a player and mill a card for each creature we control with defender.
Kiora, Behemoth Beckoner
Kiora is cheap at 3 mana, which allows us to get access to get to the signature spell early for early small draws. We are not interested in the static ability as none of our creatures have power greater than 4. We are mostly interested in using Kiora for her high loyalty and the minus ability. She allows us to untap our Axebane Guardian, Overgrown Battlement, and Doorkeeper, allowing us to activate any of those a second time in a turn. Conveniently, Kiora's Follower does the same thing for us, adding redundancy to our otherwise singleton deck.
Our choice in defenders are some of the ones with larger toughness. This allows us to possibly get aggressive with the use of Assault Formation. Certainly not the main objective in the slightest, but it presents an opportunity.
Overall, this is a unique strategy. Your playgroup may not trust a group hug player, but the use of defenders may protect you well enough that they may not have a choice but to deal with it.
If you are looking for a fun, budget friendly option to bring to the table, consider bringing Kiora to the table and giving everyone a hug.