History of the Deck
The deck was originally built back in 2015 after playing with an Orzhov Exalted deck in Duels of the Planeswalkers 2013.
I built the deck on a budget and was not full exalted until 2020. In 2020, the deck became full exalted.
In 2022, the deck received its first upgrade package by including fast lands, pain lands, a playset of Cathedral of Wars and a playset of Fabled Passage.
In 2023, it received a small upgrade package by splashing green making the deck as an Abzan build by including a playset of Ignoble Hierarch and a pair of two Golgari fast lands. This was done in the first half of 2023.
In fall 2023, the deck will receive another upgrade package consisting of Noble Hierarch and three fetchlands. The package will also include new sleeves and better inner sleeves.
This is my main modern deck
strategy
If you declare exactly one creature as an attacker, each exalted ability on each permanent you control (including, perhaps, the attacking creature itself) will trigger. The bonuses are given to the attacking creature, not to the permanent with exalted. Ultimately, the attacking creature will wind up with +1/+1 for each of your exalted abilities.
Some cards with exalted abilities have other abilities that also trigger when a creature you control attacks alone. Each time a creature you control attacks alone, both the exalted ability and the other ability will trigger.
If you attack with multiple creatures, but then all but one are removed from combat, your exalted abilities won't trigger.
Some effects put creatures onto the battlefield attacking. Since those creatures were never declared as attackers, they're ignored by exalted abilities. They won't cause exalted abilities to trigger. If any exalted abilities have already triggered (because exactly one creature was declared as an attacker), those abilities will resolve as normal even though there may now be multiple attackers.
Exalted abilities will resolve before blockers are declared.
Exalted bonuses last until end of turn. If an effect creates an additional combat phase during your turn, a creature that attacked alone during the first combat phase will still have its exalted bonuses in that new phase. If a creature attacks alone during the second combat phase, all your exalted abilities will trigger again.
In a Two-Headed Giant game, a creature "attacks alone" if it's the only creature declared as an attacker by your entire team. If you control that attacking creature, your exalted abilities will trigger but your teammate's exalted abilities won't.
Source: MTG Wiki
From the Comprehensive Rules (September 1, 2023—Wilds of Eldraine)
702.83. Exalted
702.83a Exalted is a triggered ability. “Exalted” means “Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.”
702.83b A creature “attacks alone” if it’s the only creature declared as an attacker in a given combat phase.