Ashnod's Altar, Mentor of the Meek, and Cryptcaller Chariot

Prerequisites

• Ashnod's Altar on the battlefield
• Mentor of the Meek on the battlefield
• Cryptcaller Chariot on the battlefield

Steps

1. During your cleanup step, discard cards down to your maximum hand size
2. Cryptcaller Chariot triggers, creating a number of tapped 2/2 Zombie creature tokens equal to the number of cards you discarded
3. When the Zombie(s) enter, Mentor of the Meek triggers that many times
4. Holding priority, activate Ashnod's Altar by sacrificing a Zombie, adding
5. Resolve the first Mentor of the Meek trigger, causing you to pay to draw a card
6. Resolve all remaining Mentor of the Meek triggers, as applicable, choosing not to pay
7. As it's still your cleanup step, you will again discard cards down to your maximum hand size
8. Repeat from step 2

Results

• Infinite draw triggers
• Infinite rummaging
• Infinite self-discard triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite colorless mana
• Near-infinite death triggers
• Near-infinite sacrifice triggers
• Near-infinite tapped creature tokens