Yenna, Redtooth Regent, Agatha's Soul Cauldron, Ashnod's Altar, and Zealous Conscripts

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Agatha's Soul Cauldron on the battlefield
• Ashnod's Altar on the battlefield
• Zealous Conscripts on the battlefield
• plus enough mana to activate the Licid's ability
• available

Steps

1. Activate Zealous Conscripts using the Licid's ability by paying its activation cost, attaching Zealous Conscripts to Yenna and causing Zealous Conscripts to become an Aura
2. Activate Yenna by paying and tapping it, creating a token copy of Zealous Conscripts
3. When the Zealous Conscripts token enters, it triggers, untapping Yenna
4. Activate Ashnod's Altar by sacrificing the Zealous Conscripts token, adding
5. Repeat from step 2

Results

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