Activate Ashnod's Altar by sacrificing Izzet Chronarch, adding CC.
When Izzet Chronarch dies, Mortuary triggers, putting Izzet Chronarch on top of your library from your graveyard.
Cast Hit the Mother Lode by paying 4, exiling Izzet Chronarch from the top of your library and casting it without paying its mana cost, and creating five tapped Treasure artifact tokens.
When Izzet Chronarch and the Treasures enter the battlefield, Amulet of Vigor triggers five times and Izzet Chronarch triggers once.
Resolve all Amulet of Vigor triggers, untapping the Treasures.
Resolve the Izzet Chronarch trigger, returning Hit the Mother Lode from your graveyard to your hand.
Activate five Treasures by tapping and sacrificing them, adding 2.
Repeat.
This intricate loop transforms a single cast of Hit the Mother Lode into an endless engine of wealth and arcane recursion. When you cast Hit the Mother Lode, you exile Izzet Chronarch off the top of your library and flood the board with five tapped Treasure tokens, which instantly spring upright thanks to Amulet of Vigor's passive untap ability. Meanwhile, Mortuary acts as a crucial sorting filter, quietly intercepting Izzet Chronarch the moment Ashnod's Altar sends it to the graveyard and placing it right back on top of your library for the spell's Discover effect to catch. Finally, Izzet Chronarch's own entry trigger retrieves Hit the Mother Lode back to your hand, allowing the sacrificed Treasures and continuous mana production to fund the entire performance over and over again.