Yenna, Redtooth Regent, Ashnod's Altar, Jump Scare, and Breaching Hippocamp

Prerequisites

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

Steps

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

Results

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