Long Feng, Grand Secretariat, Invisible Woman, Sue Storm, and Phantom Train

Prerequisites

• Long Feng, Grand Secretariat on the battlefield
• Invisible Woman, Sue Storm on the battlefield
• Phantom Train on the battlefield

Steps

1. Put a +1/+1 counter on the other Hero
2. Invisible Woman triggers, creating a creature token
3. Activate Phantom Train by sacrificing the creature token
4. When the creature token dies, Long Feng triggers, putting a +1/+1 counter on the other Hero
5. Invisible Woman triggers, creating a creature token
6. Resolve the Phantom Train ability
7. Repeat from step 3

Results

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