Yomiji, Who Bars the Way, Morophon, the Boundless, The First Sliver, and Bloodflow Connoisseur

Prerequisites

• Yomiji, Who Bars the Way on the battlefield
• Morophon, the Boundless on the battlefield
• The First Sliver on the battlefield
• Bloodflow Connoisseur on the battlefield

Steps

1. Activate Bloodflow Connoisseur by sacrificing The First Sliver
2. Yomiji triggers, returning The First Sliver from your graveyard to your hand
3. Resolve the Bloodflow Connoisseur trigger
4. Cast The First Sliver by paying
5. The First Sliver's cascade ability triggers, allowing you to cascade
6. The First Sliver enters the battlefield
7. Repeat

Results

• Cast a subset of spells in your library
• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite storm count