Prosper, Tome-Bound, Goldspan Dragon, Flameskull, Grimgrin, Corpse-Born, and Kaya, Geist Hunter

Prerequisites

• Prosper, Tome-Bound on the battlefield
• Goldspan Dragon on the battlefield
• Flameskull on the battlefield or in exile
• Grimgrin, Corpse-Born on the battlefield
• Kaya, Geist Hunter on the battlefield
• available

Steps

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn
2. Activate Grimgrin by sacrificing Flameskull
3. When Flameskull dies, it triggers, exiling it and the top card of your library with the ability to cast one from exile this turn
4. Resolve the Grimgrin ability
5. Cast Flameskull from exile by paying
6. Prosper's second ability triggers, creating two Treasure tokens
7. Activate the Treasures by tapping and sacrificing them, adding
8. Repeat from step 2

Results

• Exile your library
• Infinite Treasure tokens
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite artifact tokens
• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite storm count