Grenzo, Dungeon Warden, Murderous Rider // Swift End, and Ashnod's Altar

Prerequisites

• Grenzo, Dungeon Warden on the battlefield
• Murderous Rider // Swift End on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Murderous Rider, adding
2. Murderous Rider dies, putting itself from your graveyard onto the bottom of your library
3. Activate Grenzo by paying , putting Murderous Rider into your graveyard from the bottom of your library, then putting Murderous Rider from your graveyard onto the battlefield
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers