Yenna, Redtooth Regent, Ashnod's Altar, Jump Scare, and Deceiver Exarch

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Ashnod's Altar on the battlefield
• Jump Scare in hand
• Deceiver Exarch on the battlefield
• available

Steps

1. Cast Jump Scare by paying , targeting Deceiver Exarch
2. Activate Yenna by paying and tapping it, creating a token copy of Deceiver Exarch
3. When the Deceiver Exarch token enters, it triggers, untapping Yenna
4. Activate Ashnod's Altar by sacrificing the Deceiver Exarch token, adding
5. Repeat from step 2

Results

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