Yenna, Redtooth Regent, Ashnod's Altar, Jump Scare, and Little Bear

Prerequisites

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

Steps

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

Results

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