Activate Ashnod's Altar by sacrificing Mnemonic Wall, adding CC.
When Mnemonic Wall dies, Mortuary triggers, putting Mnemonic Wall on top of your library from your graveyard.
Cast Hit the Mother Lode by paying 4, exiling Mnemonic Wall from the top of your library and casting it without paying its mana cost, and creating five tapped Treasure artifact tokens.
When Mnemonic Wall and the Treasures enter the battlefield, Amulet of Vigor triggers five times and Mnemonic Wall triggers once.
Resolve all Amulet of Vigor triggers, untapping the Treasures.
Resolve the Mnemonic Wall trigger, returning Hit the Mother Lode from your graveyard to your hand.
Activate five Treasures by tapping and sacrificing them, adding 2.
Repeat.
This ingenious loop relies on a clever mana-and-recycling engine to continuously replay a massive spell for free. By sacrificing Mnemonic Wall to Ashnod's Altar, you fuel the casting of Hit the Mother Lode while Mortuary dutifully redirects the Wall right back to the top of your library to be discovered. Meanwhile, Amulet of Vigor ensures that the five tapped Treasure tokens generated by the spell instantly untap upon entry, providing the exact mana needed to recast Hit the Mother Lode and keep the cycle spinning infinitely.