Toph, the First Metalbender, Haru, Hidden Talent, Phantom Train, and Universal Automaton

Prerequisites

• Toph, the First Metalbender on the battlefield
• Haru, Hidden Talent on the battlefield
• Phantom Train on the battlefield
• Universal Automaton in hand
• available

Steps

1. Cast Universal Automaton by paying
2. When Universal Automaton enters, Haru triggers, targeting Universal Automaton as it is a land due to Toph
3. Activate Phantom Train by sacrificing Universal Automaton
4. When Universal Automaton dies, Haru triggers, returning Universal Automaton from your graveyard to the battlefield tapped
5. When Universal Automaton enters, Haru triggers, targeting Universal Automaton as it is a land due to Toph
6. Resolve the Phantom Train ability
7. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers
• Infinite +1/+1 counters on a creature