When Ardent Elementalist dies, Mortuary triggers, putting Ardent Elementalist on top of your library from your graveyard.
Cast Hit the Mother Lode by paying ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) , exiling Ardent Elementalist from the top of your library and casting it without paying its mana cost, and creating six tapped Treasure artifact tokens.
When Ardent Elementalist and the Treasures enter the battlefield, Amulet of Vigor triggers six times and Ardent Elementalist triggers once.
Resolve all Amulet of Vigor triggers, untapping the Treasures.
Resolve the Ardent Elementalist trigger, returning Hit the Mother Lode from your graveyard to your hand.
Activate six Treasures by tapping and sacrificing them, adding ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) .