The goal is to quickly start attacking with Knights to trigger the looting ability of Sidar Jabari of Zhalfir, discard cards we don't need or expensive Knights to reanimate later with Sidar, and keep developing our board with Knights until we eventually can start swinging for lethal with the aid of cards like Knights' Charge
With the exception of basic land cards, a player's combined deck and sideboard may not contain more than four of any individual card, counted by its English card title equivalent
The Ancient Gold Dragon creates 1d20 1/1 flying blue Fairy tokens, the Ancient Brass Dragon reanimates creatures from any graveyard worth 1d20 total mana, and the Ancient Copper Dragon creates 1d20 Treasure tokens
Nahiri, Forged in Fury has affinity for said equipment cards and can help you top deck into even more equipment cards
You can make it grow by self-milling too, which is something GB decks have the tools for