Yenna, Redtooth Regent, Ashnod's Altar, Jump Scare, and Giant-Sized Flying Ant

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Ashnod's Altar on the battlefield
• Jump Scare in hand
• Giant-Sized Flying Ant on the battlefield
• available

Steps

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

Results

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