Blood Artist, Reassembling Skeleton, Carnival of Souls, and Ashnod's Altar

Prerequisites

• Blood Artist on the battlefield
• Reassembling Skeleton on the battlefield
• Carnival of Souls on the battlefield
• Ashnod's Altar on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Reassembling Skeleton, adding
2. Blood Artist trigger, causing target player to lose 1 life and gaining you 1 life
3. Activate Reassembling Skeleton by paying , returning it to the battlefield
4. Reassembling Skeleton enters the battlefield triggering Carnival of Souls
5. Resolve the Carnival of Souls trigger by losing one life and adding
6. Repeat

Results

• Infinite colorless mana
• Infinite damage
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers