Hit the Mother Lode + Mortuary + Skullwinder + Amulet of Vigor + Goblin Bombardment

Hit the Mother Lode

Mortuary

Skullwinder

Amulet of Vigor

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Skullwinder.
2. When Skullwinder dies, Mortuary triggers, putting Skullwinder on top of your library from your graveyard.
3. Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
4. Cast Hit the Mother Lode by paying 4, exiling Skullwinder from the top of your library and casting it without paying its mana cost, and creating seven tapped Treasure artifact tokens.
5. When Skullwinder and the Treasures enter the battlefield, Amulet of Vigor triggers seven times and Skullwinder triggers once.
6. Resolve all Amulet of Vigor triggers, untapping the Treasures.
7. Resolve the Skullwinder trigger, returning Hit the Mother Lode from your graveyard to your hand, and causing an opponent to return a card from their graveyard to their hand.
8. Activate seven Treasures by tapping and sacrificing them, adding 4.
9. Repeat.

This loop relies on stacking the top of your library with Skullwinder via Mortuary whenever you sacrifice it to Goblin Bombardment. From there, casting Hit the Mother Lode allows you to discover directly into Skullwinder while generating a massive wave of tapped Treasure tokens. Amulet of Vigor immediately steps in to untap those Treasures so you can sacrifice them for the exact mana needed to cast the spell all over again, while Skullwinder's entry trigger conveniently loops Hit the Mother Lode right back to your hand.