This clever loop uses Ashnod's Altar to continuously sacrifice Rograkh, Son of Rohgahh, which costs nothing to cast from the command zone and instantly refunds two colorless mana per iteration. While Myth Unbound natively provides a card draw whenever your commander hits the zone from anywhere, Mirage Mirror steps in as a vital force multiplier by copying Myth Unbound—allowing you to stack multiple copies so that every sacrifice draws you an expanding hand of cards. Because each cycle increases the number of active draw triggers, you rapidly churn through your entire deck while generating a massive surplus of colorless mana.