Yenna, Redtooth Regent, Agatha's Soul Cauldron, Ashnod's Altar, and Coercive Recruiter

Prerequisites

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

Steps

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

Results

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