Yenna, Redtooth Regent, Agatha's Soul Cauldron, Ashnod's Altar, and Giant-Sized Flying Ant

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Agatha's Soul Cauldron on the battlefield
• Ashnod's Altar on the battlefield
• Giant-Sized Flying Ant on the battlefield
• plus enough mana to activate the Licid's ability available

Steps

1. Activate Giant-Sized Flying Ant using the Licid's ability by paying its activation cost, attaching Giant-Sized Flying Ant to Yenna and causing Giant-Sized Flying Ant to become an Aura
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